Relevant bibliographies by topics / Multiferroic

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Multiferroic'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 November 2024

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Multiferroic.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Multiferroic"

1

Zhao, Shifeng. "Advances in Multiferroic Nanomaterials Assembled with Clusters." Journal of Nanomaterials 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/101528.

Full text
Abstract:
As an entirely new perspective of multifunctional materials, multiferroics have attracted a great deal of attention. With the rapidly developing micro- and nano-electro-mechanical system (MEMS&NEMS), the new kinds of micro- and nanodevices and functionalities aroused extensive research activity in the area of multiferroics. As an ideal building block to assemble the nanostructure, cluster exhibits particular physical properties related to the cluster size at nanoscale, which is efficient in controlling the multiferroic properties for nanomaterials. This review focuses on our recent advances in multiferroic nanomaterials assembled with clusters. In particular, the single phase multiferroic films and compound heterostructured multiferroic films assembled with clusters were introduced detailedly. This technique presents a new and efficient method to produce the nanostructured multiferroic materials for their potential application in NEMS devices.
APA, Harvard, Vancouver, ISO, and other styles
2

Zhao, By Weijie. "Pas de deux of electricity and magnetism: an interview with Sang-Wook Cheong." National Science Review 6, no. 4 (January 31, 2019): 703–6. http://dx.doi.org/10.1093/nsr/nwz004.

Full text
Abstract:
Abstract Materials can be ferroelectric, having a spontaneous electric polarization that can be reversed by an external electric field, or they can be ferromagnetic, exhibiting spontaneous magnetization that is switchable by an applied magnetic field. However, until the 1960s, scientists did not expect that these two ferroic properties could co-exist in a single material. Today, materials exhibiting more than one of the primary ferroic properties are called multiferroics. Here, the primary ferroic properties can be ferroelectricity, ferromagnetism, antiferromagnetism, ferroelasticity, ferrotoroidicity or others. Basically, the multiferroic effect originates from the simultaneous breaking of space inversion and time-reversal symmetries. Multiferroics can be imagined as a pas de deux of electricity and magnetism. Recently, National Science Review interviewed Professor Sang-Wook Cheong from Rutgers University, who is one of the pioneering scientists in this field. Cheong talked about the multiferroics field, which has been fast developing since the early 2000s. His introductions and opinions on diverse multiferroic materials and potential multiferroic devices, as well as future research directions, may provide a useful resource for researchers both inside and outside the multiferroic research field.
APA, Harvard, Vancouver, ISO, and other styles
3

DONG, SHUAI, and JUN-MING LIU. "RECENT PROGRESS OF MULTIFERROIC PEROVSKITE MANGANITES." Modern Physics Letters B 26, no. 09 (April 8, 2012): 1230004. http://dx.doi.org/10.1142/s0217984912300049.

Full text
Abstract:
So far tens of multiferroic materials, with various chemical compositions and crystal structures, have been discovered in the past years. Among these multiferroics, some perovskite manganites with ferroelectricity driven by magnetic orders are of particular interest. In these multiferroic perovskite manganites, the multiferroic phenomena are not only quite prominent, but the involved physical mechanisms are also very plenty and representative. In this brief review, we will introduce some recent theoretical and experimental progress on multiferroic manganites, including the fascinating microscopic physics and very recently addressed experimental findings with attractive multiferroicity.
APA, Harvard, Vancouver, ISO, and other styles
4

Shukla, Dinesh, Nhalil E. Rajeevan, and Ravi Kumar. "Combining Magnetism and Ferroelectricity towards Multiferroicity." Solid State Phenomena 189 (June 2012): 15–40. http://dx.doi.org/10.4028/www.scientific.net/ssp.189.15.

Full text
Abstract:
The attempts to combine both the magnetic and ferroelectric properties in one material started in 1960s predominantly by the group of Smolenskii and Schmid [1. Dzyaloshinskii first presented the theory for multiferroicity in Cr2O3, which was soon experimentally confirmed by Astrov [5,. Further work on multiferroics was done by the group of Smolenskii in St. Petersburg (then Leningrad) [7, but the term multiferroic was first used by H. Schmid in 1994 [. These efforts have resulted in many fundamental observations and opened up an entirely new field of study. Schmid [ defined the multiferroics as single phase materials which simultaneously possess two or more primary ferroic properties. The term multiferroic has been expanded to include materials which exhibit any type of long range magnetic ordering, spontaneous electric polarization, and/or ferroelasticity. In the past decade, several hundreds of papers related to multiferroic materials and magnetoelectric effect have been published every year, making this topic one of the hottest areas in condensed matter physics from fundamental science as well as applications viewpoints. This article sheds light on recent progress about the developments of new multiferroics by combining unconventional magnetism and ferroelectricity with an emphasis on Bi based multiferroic materials. Specifically results of Ti doped BiMn2O5and Bi doped Co2MnO4multiferroics are discussed.
APA, Harvard, Vancouver, ISO, and other styles
5

Gareeva, Z. V., A. K. Zvezdin, and T. T. Gareev. "Ferroelectric and Magnetic Domain Walls in High Temperature Multiferroic Films and Heterostructures." Materials Science Forum 845 (March 2016): 7–12. http://dx.doi.org/10.4028/www.scientific.net/msf.845.7.

Full text
Abstract:
In the last decade, considerable attention has been focused on the search of new multiferroic materials and the ways of improvement of their magnetoelectric properties. In this short review, we survey the progress in study of multiferroics focusing the high temperature multiferroic bismuth ferrite and rare earth iron garnets. We discuss the recent results of investigation of domain walls in multiferroics, concentrating the most important magnetoelectric manifestations (electric polarization and magnetization), and the pinning effect appearing as clamping of ferroelectric and magnetic domain walls.
APA, Harvard, Vancouver, ISO, and other styles
6

Grotel, Jakub. "MAGNETOELECTRIC COUPLING MEASUREMENT TECHNIQUES IN MULTIFERROIC MATERIALS." Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska 11, no. 1 (March 31, 2021): 10–14. http://dx.doi.org/10.35784/iapgos.2583.

Full text
Abstract:
Magnetoelectric multiferroics are solid-state materials which exhibit a coupling between ferroelectric and magnetic orders. This phenomenon is known as the magnetoelectric (ME) effect. Multiferroic materials possess a wide range of potential applications in such fields as metrology, electronics, energy harvesting & conversion, and medicine. Multiferroic research is facing two main challenges. Firstly, scientists are continuously trying to obtain a material with sufficiently strong, room-temperature ME coupling that would enable its commercial application. Secondly, the measurement techniques used in multiferroic research are often problematic to implement in a laboratory setting and fail to yield reproducible results. The aim of the present work is to discuss three most commonly used methods in multiferroic studies; the lock-in technique, the Sawyer-Tower (S-T) circuit and dielectric constant measurements. The paper opens with a general description of multiferroics which is followed by mathematical representation of the ME effect. The main body deals with the description of the aforementioned measurement techniques. The article closes with a conclusion and outlook for future research.
APA, Harvard, Vancouver, ISO, and other styles
7

Liu, Sheng, Feng Xiang, Yulan Cheng, Yajun Luo, and Jing Sun. "Multiferroic and Magnetodielectric Effects in Multiferroic Pr2FeAlO6 Double Perovskite." Nanomaterials 12, no. 17 (August 30, 2022): 3011. http://dx.doi.org/10.3390/nano12173011.

Full text
Abstract:
Single-phase multiferroics that allow the coexistence of ferroelectric and magnetic ordering above room temperature are highly desirable, and offer a fundamental platform for novel functionality. In this work, a double perovskite multiferroic Pr2FeAlO6 ceramic is prepared using a sol-gel process followed by a quenching treatment. The well-crystallized and purified Pr2FeAlO6 in trigonal structure with space group R3c is confirmed. A combination of the ferroelectric (2Pr = 0.84 μC/cm2, Ec = 7.78 kV/cm at an applied electric field of 20 kV/cm) and magnetic (2Mr = 433 memu/g, Hc = 3.3 kOe at an applied magnetic field of 1.0 T) hysteresis loops reveals the room-temperature multiferroic properties. Further, the magnetoelectric effect is observed from the measurements of magnetically induced dielectric response and polarization. The present results suggest a new complex oxide candidate for room-temperature multiferroic applications.
APA, Harvard, Vancouver, ISO, and other styles
8

Mączka, Mirosław, Adam Sieradzki, Bartosz Bondzior, Przemysław Dereń, Jerzy Hanuza, and Krzysztof Hermanowicz. "Effect of aliovalent doping on the properties of perovskite-like multiferroic formates." Journal of Materials Chemistry C 3, no. 36 (2015): 9337–45. http://dx.doi.org/10.1039/c5tc02295a.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Gilioli, Edmondo, and Lars Ehm. "High pressure and multiferroics materials: a happy marriage." IUCrJ 1, no. 6 (October 31, 2014): 590–603. http://dx.doi.org/10.1107/s2052252514020569.

Full text
Abstract:
The community of material scientists is strongly committed to the research area of multiferroic materials, both for the understanding of the complex mechanisms supporting the multiferroism and for the fabrication of new compounds, potentially suitable for technological applications. The use of high pressure is a powerful tool in synthesizing new multiferroic, in particular magneto-electric phases, where the pressure stabilization of otherwise unstable perovskite-based structural distortions may lead to promising novel metastable compounds. Thein situinvestigation of the high-pressure behavior of multiferroic materials has provided insight into the complex interplay between magnetic and electronic properties and the coupling to structural instabilities.
APA, Harvard, Vancouver, ISO, and other styles
10

Khannanov B.Kh., Sanina V.A., Golovenchits E.I., and Lushnikov S.G. "Phase transitions and phase transformations in the phase separation nanoregions in ErMn-=SUB=-2-=/SUB=-O-=SUB=-5-=/SUB=- multiferroics." Physics of the Solid State 63, no. 13 (2022): 1728. http://dx.doi.org/10.21883/pss.2022.13.52313.155.

Full text
Abstract:
The effect of the rare-earth ion Er3+, which has a large orbital contribution to the magnetic moment, were studied to phase transitions and phase transformations of 2D nanoregions of phase separation in the ErMn2O5 multiferroic. These nanoregions are the semiconductor heterostructures (superlattices) and are formed due to self-organization processes in the ErMn2O5 matrix. Significant effect of Er3+ ions, the moments of which are rigidly oriented along the c axis of the crystal, on the magnetic dynamics, heat capacity and multiferroic properties of layers superlattises was found at a wide temperature range 5-300 K in ErMn2O5 multiferroics. Keywords: multiferroic, 2D phase separation nanoregions, semiconductor-heterostructures, superlattices, phase transitions, phase transformations.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Multiferroic"

1

Lawrence, Shane Michael. "X-ray and neutron scattering of multiferroic LuFe2O4." Thesis, Curtin University, 2011. http://hdl.handle.net/20.500.11937/1336.

Full text
Abstract:
Multiferroic materials have recently begun to attract significant scientific interest due to their potential applications in the design of modern electronic devices. Currently, the magnetic properties of materials form the basis of our electronic data storage and have the potential to enhance the logic operations performed in electronic devices (such as computers and sensors). Non-volatile magnetic memory is used in data storage devices, such as the hard drives found in personal computers, where data is encoded via the magnetisation state of magnetic domains in the device with one of two states: either up or down (M ↑ or M ↓); the state is determined or changed by interacting with the magnetic flux about the domain. Furthermore, in current computing and sensor technology, logic operations are performed with arrays of transistors; however, in spintronics ("spin transport electronics") the electric current itself is spin polarised and there is data encoded in the current itself. Circuit elements in such a system are magnetic devices that interact with the electron spin.Magnetoelectric multiferroics are materials that have both a spontaneous ferroelectric polarisation (P) and magnetic magnetisation (M). Polarisation may be manipulated by an electric field and magnetisation by a magnetic field, hence the potential of multiferroics lies in the coupling between the two degrees of freedom and the manipulation of magnetisation by an applied electric field and vice versa. The properties of a magnetic device could be altered "on-the-fly" by applying an electric pulse, and in the context of the examples provided this would greatly diversify the logic elements in spintronic circuits. Furthermore, with both polarisation and magnetisation a multiferroic domain can take on one of four states (M ↑ P ↑, M ↑ P ↓, M ↓ P ↑, or M ↓ P ↓) dramatically increasing data storage density over the current binary system.Lutetium ferrite (LuFe2O4) is a multiferroic material in which both the magnetisation and polarisation arise from the iron sites and with strong iron-iron correlations the material is a promising candidate as a high temperature multiferroic. The material has a layered structure with bilayers of FeO separated by single layers of LuO on a hexagonal lattice. Frustrated 2D charge order exists below 550 K which transitions to 3D charge order below 330 K and simultaneously frustrated ferrimagnetic order exists in the multiferroic phase below 250 K. X-ray and neutron scattering experiments have been performed in order to characterise the ferroelectric and ferrimagnetic order and magnetoelectric coupling in this material.Resonant x-ray scattering (RXS) was performed on the Material Science beamline of the Swiss Light Source where the energy dependence of the superlattice reflections corresponding to the charge order was collected. Non-linear regression using a custom Levenberg-Marquadt algorithm was applied in order to extract the anomalous scattering factors which demonstrated the superlattice reflections were described by a charge order model. Furthermore, the chemical shift was shown to correspond to full Fe2+/Fe3+ charge disproportionation. The absence of any polarisation or azimuthal dependence, shown by resonant x-ray scattering data collected on the ID20 beamline of the European Synchrotron Radiation Facility, confirmed the prediction of Nagano et al. that the orbital moments of the Fe2+-sites exist in a disordered glassy state.X-ray absorption near edge structure (XANES) calculations were performed using the FDMNES program in order to assess the validity of the anomalous scattering factors obtained in the RXS experiment and to further test the charge order model. It was shown that the characteristic features of the experimentally determined functions can be qualitatively reproduced by calculations using the known charge order model. Furthermore, these functions were shown to reproduce the phase of the RXS data further demonstrating that the reflections result from a pure charge ordered phase.Inelastic neutron scattering performed on the PUMA triple axis spectrometer of the FRMII demonstrated that magnetic critical scattering is observed at 250 K. A broad peak in the temperature dependence is observed rather than the characteristic divergence of a magnetic transition: this is attributed to broadening of the transition by the distribution of oxygen stoichiometry in the sample and ferroelectric fluctuations integrated into the data due to poor c-axis resolution. Pyroelectric current and magnetometry measurements demonstrate a peak in the magnetic susceptibility and a step in the polarisation at approximately 215 K, well below the magnetic transition. Elastic neutron scattering experiments performed on the E2 flat cone diffractometer of the Helmholtz-Zentrum Berlin demonstrate these features correspond to a 2D-to-3D magnetic transition that has previously only been predicted by anomalies in other measurements.An applied field study performed by neutron scattering on the E2 flat cone diffractometer of the Helmholtz-Zentrum Berlin and x-ray scattering on the PX1 protein crystallography beamline of the Australian synchrotron demonstrate the control of the magnetic domain population with an electric field, contrary to other recent reports on this topic. Furthermore, the observed magnetoelectric coupling is inconsistent with current models of the magnetic structure of this system. The x-ray measurements demonstrate a disorder-to-order effect by the applied electric field as 3D order is preferred with an increase in the intensity of all satellites.Temperature dependent x-ray powder diffraction data collected on the Powder Diffraction (PD) beamline of the Australian Synchrotron has demonstrated anisotropic thermal expansion with negative thermal expansion of the c-axis in this material. Electron density mapping by Fourier analysis shows the disorder of the oxygen between the electrically static Lu ions and the neighbouring Fe ions, as electron hopping between Fe2+ and Fe3+ leading to a corresponding variation on the Fe-O bond length. Reversible structural distortions are observed indicating a piezoelectric effect in this material caused by the crushing during sample preparation. Furthermore, weak reflections in the x-ray patterns, corresponding to a monoclinic sublattice, suggest a monoclinic distortion of the oxygen sites which is supported by neutron powder diffraction collected on the ECHIDNA instrument of the OPAL reactor.
APA, Harvard, Vancouver, ISO, and other styles
2

Bufaiçal, Leandro Félix de Sousa. "Propriedades estruturais, eletrônicas e magnéticas dos óxidos Ca2-xLaxFelrO6, Sr2-xLaxFelrO6 e TbMnO3." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/278527.

Full text
Abstract:
Orientador: Pascoal José Giglio Pagliuso
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin
Made available in DSpace on 2018-08-15T19:42:04Z (GMT). No. of bitstreams: 1 Bufaical_LeandroFelixdeSousa_D.pdf: 2467040 bytes, checksum: 4460b75c04d570fb27584b7dfff2c5f3 (MD5) Previous issue date: 2010
Resumo: Há muitas décadas os óxidos de metais de transição são tema de grande interesse científico devido à grande variedade de propriedades físicas interessantes que apresentam, com suas possíveis aplicações tecnológicas. Mais recentemente, por exemplo, os óxidos de metais de transição com propriedades multiferróicas ganharam destaque na comunidade científica como potenciais dispositivos magneto-eletrônicos. Muitos óxidos de metais de transição se formam na estrutura cristalina chamada perovskita simples, com simetria cúbica ou distorcida. Muitos outros óxidos podem se cristalizar numa variante da perovskita simples, a chamada perovskita dupla ordenada (PDO), que possui fórmula geral A2B¿B¿¿O6, onde o íon A ocupa os vértices do cubo enquanto os cátions B¿ e B¿¿ se alternam nos centros dos octaedros de oxigênio. Dois compostos com estrutura PDO bastante estudados são o Sr2FeReO6 e Sr2FeMoO6 devido ao fato de apresentarem, entre outras propriedades interessantes, comportamento meio-metálico (halfmetal), magnetrorresistência por tunelamento à temperatura ambiente, ferrimagnetismo com TC acima de 400K em ambos os compostos. As propriedades estruturais, eletrônicas e magnéticas dessas PDOs estão altamente conectadas e são fortemente dependentes do grau de hibridização dos orbitais d dos cátions B¿¿. Assim, se fazem importantes os estudos de novos compostos PDO a fim de se investigar as idéias correntes propostas em literatura e, nesse contexto, reportamos aqui os resultados da síntese e caracterização das séries inéditas Ca2-xLaxFeIrO6 e Sr2-xLaxFeIrO6, onde o Ir, assim como o Re e Mo, é metal de transição, no caso com caráter 5d, e pode assumir diferentes estados de valência. As medidas de magnetização indicaram que estes sistemas tendem a evoluir de antiferromagnéticos nas extremidades das séries, x = 0 e x = 2, para ferrimagnéticos em regiões intermediárias da série. Medidas realizadas no composto de maior magnetização da série de Sr, o Sr1.2La0.8FeIrO6, indicaram que este composto se ordena ferrimagneticamente em torno de 700 K, sendo esta a mais elevada TC já reportada para perovskitas duplas. Medidas de resistividade em função da temperatura indicaram que os compostos apresentam comportamento isolante e praticamente nenhum efeito magneto-resistivo. No composto antiferromagnético Sr2FeIrO6 foi estudada a resistividade sob efeito de pressão e, embora não tenha ocorrido nenhuma transição metal-isolante, ocorre uma diminuição sistemática da resistência do material e da inclinação da curva à medida que a pressão aumenta, indicando um comportamento do tipo isolante de Mott nesse composto. Neste trabalho são apresentados também resultados dos estudos realizados na perovskita TbMnO3. Realizamos neste óxido medidas de susceptibilidade magnética, calor específico, Ressonância Paramagnética Eletrônica (EPR) e absorção de microondas para várias temperaturas. A susceptibilidade magnética e o calor específico confirmaram para a amostra estudada as temperaturas de transição de fase magnética (TN = 41 K) e ferroelétrica (Tlock) já reportadas em literatura. Os espectros de EPR mostraram para todo o intervalo de temperatura uma única linha consistente com uma forma de linha Lorentziana e um valor de g independente da temperatura g = 1.96(3) consistente com Mn3+ em um meio isolante. A largura de linha sofreu um alargamento com a temperatura seguindo uma lei do tipo C/T. Esse alargamento impediu a observação dos espectros de ressonância em torno das regiões de temperaturas das transições de fase magnética e ferroelétrica. Devido à forte dependência da constante dielétrica com a freqüência, as medidas realizadas com a cavidade de campo elétrico não permitiram a observação de qualquer anomalia em torno das temperaturas de transições
Abstract: For many decades the transition metal oxides are subject of great scientific interest because of the wide variety of interesting physical properties and their potential technological applications. More recently, for example, oxides of transition metals with multiferroic properties have been considered as potential magneto-electronic devices. Many transition metal oxides form in the perovskite crystalline structure, with cubic or distorted symmetry. Many other oxides can crystallize in a variant of the simple perovskite, called the ordered double perovskite (ODP), which has the general formula A2B'B''O6, where the A ion occupies the vertices of the cube while the cations B 'and B'' alternate in the centers of the oxygen octahedra. Sr2FeReO6 and Sr2FeMoO6 are two compounds with the ODP structure which were extensively studied due to their interesting properties such as half-metal behavior, tunneling magnetoresistance at room temperature and ferrimagnetic order (TC above 400 K). The structural, electronic and magnetic properties of these ODPs are highly correlated and are strongly dependent on the strong d orbitals hybridization of the of the B'' cations. Therefore, studies of new ODP compounds are important in order to investigate the current ideas proposed in the literature and improve the understanding of their physical properties. We report here our results of synthesis and characterization of the unpublished series Ca2-xLaxFeIrO6 and Sr2-xLaxFeIrO6, where the Ir such as Re and Mo are transition metal, with d character that can assume different valence states. The magnetic measurements indicated that those systems tend to evolve from antiferromagnetics at the ends of the series, x = 0 and x = 2, to ferrimagnetic for intermediate regions of the series. Measurements performed in the compound of higher magnetization in the Sr serie, Sr1.2La0.8FeIrO6 indicated that this compound orders ferrimagnetic around 700 K, which is the highest TC ever reported for double perovskites. Resistivity measurements as a function of temperature indicated that these compounds also exhibit insulating behavior and virtually no magneto-resistive effect. In the antiferromagnetic compound Sr2FeIrO6, the effect of pressure on the resistivity was investigated, and although no metal-insulator transition was seen, there is a systematic decrease of the resistance and the slope of the curve as the pressure increases, indicating a Mott insulator-like behavior in this compound. This work also presents results on the TbMnO3 perovskite. We have performed magnetic susceptibility, specific heat, Electron Paramagnetic Resonance (EPR) and microwave absorption measurements at various temperatures. Magnetic susceptibility and specific heat data confirmed the ocurrence of a magnetic (TN = 41 K) and ferroelectric (Tlock) phase transition. The EPR spectra showed, for the entire temperature range measured, a single Lorentzian line shape and T independent g-value = 1.96 (3), consistent with the resonance of Mn3+ in an insulating environment. The width line broadens with the decreasing temperature following a C/T law. This broadening prevented the observation of the resonance spectra near the magnetic and ferroelectric phase transitions. Because of the strong frequency dependence of the dielectric constant, the measurements performed with the electric field cavity also did not allow observation of any anomaly around the ferroelectric transition
Doutorado
Física da Matéria Condensada
Doutor em Ciências
APA, Harvard, Vancouver, ISO, and other styles
3

Kim, Jong-Woo. "Multiferroic hexagonal HoMnO3 films." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-26142.

Full text
Abstract:
The fundamental properties of hexagonal multiferric HoMnO3 films have been thoroughly investigated. The films are grown by pulsed laser deposition on Y:ZrO2(111) substrates. High quality epitaxial HoMnO3 films of 25 { 1000 nm thickness were successfully prepared. The film properties are compared to those of single-crystals. The magnetization measurements revealed that the films show a deviating magnetic behavior from the single-crystals in several ways. For instance, the films have a weakened antiferromagnetic Ho3+ order confirmed from magnetic susceptibility. The difierences are likely to be related to the modified (mostly larger) lattice parameters of films. An approximate phase diagram in comparison with the single-crystal's one is constructed. For multiferroicity investigations, Second Harmonic Generation (SHG; in collaboration with the group of M. Fiebig) has been employed. By SHG, the ferroelectric polar order of the films is obviously confirmed. The ferroelectric switching at room temperature could be clearly demonstrated, whereas leakage of films requires generally a more sophisticated approach
Die fundamentalen Eigenschaften von hexagonalen multiferroischen HoMnO3 Schichten werden eingehend untersucht. Die dünnen Schichten wurden mittels gepulster Laserdeposition auf Y:ZrO2(111)-Substraten gewachsen. Hochwertige epitaktische HoMnO3-Dünnschichten von 25 { 1000 nm Dicke wurden erfolgreich hergestellt. Die Dünnschichteigenschaften werden mit denen von Einkristallen verglichen. Die Magnitisierungsmessungen ergeben, dass die dünnen Schichten ein von den Einkristallen in verschiedener Weise abweichendes magnetischen Verhalten zeigen. Zum Beispiel haben die dünnen Schichten eine abgeschwächte antiferromagntetische Ho3+ Ordnung, die durch die magnetische Suszeptibilität bestätigt wird. Die Unterschiede sind wahrscheinlich auf die veränderten (meistens grösseren) Gitterparameter der dünnen Schichten zurückzuführen. Ein Phasendiagramm wird zum Vergleich mit Einkristallen konstruiert. Durch Second Harmonic Generation (SHG; in Zusammenarbeit mit der Gruppe von M. Fiebig) wird die ferroelektrische Ordnung der dünnen Schichten eindeutig bestätigt. Das ferroelektrische Umschalten bei Raumtemperatur kann eindeutig nachgewiesen werden, wobei durch den Leckstrom der dünnen Schichten allgemein eine detailliertere Vorgehensweise benötigt wird
APA, Harvard, Vancouver, ISO, and other styles
4

Figueiras, Fábio Gabriel Nazário. "Study of multiferroic materials." Doctoral thesis, Universidade de Aveiro, 2011. http://hdl.handle.net/10773/4271.

Full text
Abstract:
Doutoramento em Física
The present PhD work aims the research and development of materials that exhibit multiferroic properties, in particular having a significant interaction between ferromagnetism and ferroelectricity; either directly within an intrinsic single phase or by combining extrinsic materials, achieving the coupling of properties through mechanic phenomena of the respective magnetostriction and piezoelectricity. These hybrid properties will allow the cross modification of magnetic and electric polarization states by the application of cross external magnetic and/or electric fields, giving way to a vast area for scientific investigation and potential technological applications in a new generation of electronic devices, such as computer memories, signal processing, transducers, sensors, etc. Initial experimental work consisted in chemical synthesis of nano powders oxides by urea pyrolysis method: A series of ceramic bulk composites with potential multiferroic properties comprised: of LuMnO3 with La0.7Sr0.3MnO3 and BaTiO3 with La0.7Ba0.3MnO3; and a series based on the intrinsic multiferroic LuMn1-zO3 phase modified with of Manganese vacancies. The acquisition of a new magnetron RF sputtering deposition system, in the Physics Department of Aveiro University, contributed to the proposal of an analogous experimental study in multiferroic thin films and multilayer samples. Besides the operational debut of this equipment several technical upgrades were completed like: the design and construction of the heater electrical contacts; specific shutters and supports for the magnetrons and for the substrate holder and; the addition of mass flow controllers, which allowed the introduction of N2 or O2 active atmosphere in the chamber; and the addition of a second RF generator, enabling co-deposition of different targets. Base study of the deposition conditions and resulting thin films characteristics in different substrates was made from an extensive list of targets. Particular attention was given to thin film deposition of magnetic phases La1-xSrxMnO3, La1-xBaxMnO3 and Ni2+x-yMn1-xGa1+y alloy, from the respective targets: La0.7Sr0.3MnO3, La0.7Ba0.3MnO3; and NiGa with NiMn. Main structural characterization of samples was performed by conventional and high resolution X-Ray Diffraction (XRD); chemical composition was determined by Electron Dispersion Spectroscopy (EDS); magnetization measurements recur to a Vibrating Sample Magnetometer (VSM) prototype; and surface probing (SPM) using Magnetic-Force (MFM) and Piezo-Response (PFM) Microscopy. Results clearly show that the composite bulk samples (LuM+LSM and BTO+LBM) feat the intended quality objectives in terms of phase composition and purity, having spurious contents below 0.5 %. SEM images confirm compact grain packaging and size distribution around the 50 nm scale. Electric conductivity, magnetization intensity and magneto impedance spreading response are coherent with the relative amount of magnetic phase in the sample. The existence of coupling between the functional phases is confirmed by the Magnetoelectric effect measurements of the sample “78%LuM+22%LSM” reaching 300% of electric response for 1 T at 100 kHz; while in the “78%BTO+22%LBM” sample the structural transitions of the magnetic phase at ~350 K result in a inversion of ME coefficient the behavior. A functional Magneto-Resistance measurement system was assembled from the concept stage until the, development and operational status; it enabled to test samples from 77 to 350 K, under an applied magnetic field up to 1 Tesla with 360º horizontal rotation; this system was also designed to measure Hall effect and has the potential to be further upgraded. Under collaboration protocols established with national and international institutions, complementary courses and sample characterization studies were performed using Magneto-Resistance (MR), Magneto-Impedance (MZ) and Magneto-Electric (ME) measurements; Raman and X-ray Photoelectron Spectroscopy (XPS); SQUID and VSM magnetization; Scanning Electron Microscopy (SEM) and Rutherford Back Scattering (RBS); Scan Probe Microscopy (SPM) with Band Excitation Probe Spectroscopy (BEPS); Neutron Powder Diffraction (NPD) and Perturbed Angular Correlations (PAC). Additional collaboration in research projects outside the scope of multiferroic materials provided further experience in sample preparation and characterization techniques, namely VSM and XPS measurements were performed in cubane molecular complex compounds and enable to identify the oxidation state of the integrating cluster of Ru ions; also, XRD and EDS/SEM analysis of the acquired targets and substrates implied the devolution of some items not in conformity with the specifications. Direct cooperation with parallel research projects regarding multiferroic materials, enable the assess to supplementary samples, namely a preliminary series of nanopowder Y1-x-yCaxØyMn1O3 and of Eu0.8Y0.2MnO3, a series of micropowder composites of LuMnO3 with La0.625Sr0.375MnO3 and of BaTiO3 with hexagonal ferrites; mono and polycrystalline samples of Pr1-xCaxMnO3, La1-xSrxMnO3 and La1-xCaxMnO3.
O trabalho de doutoramento presente tem por objectivo a pesquisa e desenvolvimento de materiais que manifestem propriedades multiferróicas, em particular com uma significativa interacção entre os fenómenos de ferromagnetismo e ferroelectricidade; seja de forma intrínseca em determinados materiais singulares, ou extrínseca ao combinar materiais que apresentam respectivamente fenómenos magnetoestritivo e de piezoelectricidade e em que geralmente o acoplamento se processa mecanicamente entre as fases. Esta hibridação de propriedades permite a modificação dos estados de polarização magnética ou eléctrica por aplicação dos campos externos complementares (eléctricos e/ou magnéticos), dando origem a uma vasta área de investigação científica e potenciais aplicações tecnológicas numa nova geração de dispositivos electrónicos como memórias, processadores, transdutores, sensores, etc. O trabalho experimental inicial consistiu na síntese química de óxidos sob a forma de pós nanométricos, pelo método de pirólise da ureia; As séries de compósitos maciços com potenciais propriedades multiferróicas compreendem: LuMnO3 com La0.7Sr0.3MnO3 e BaTiO3 com La0.7Ba0.3MnO3; e uma série baseada na modificação com lacunas de Manganésio da fase multiferróica intrínseca LuMn1-zO3. A aquisição de um novo sistema de deposição por RF sputtering, no Departamento de Física da Universidade de Aveiro, contribuiu para a proposta de estudo análogo de amostras multiferróicas sob a forma de filmes finos e multicamadas. Além da estreia operacional do equipamento foram efectuadas algumas melhorias técnicas e funcionais de que se destacam: o desenho e construção das ligações eléctricas do aquecedor; de portadas, protecções e respectivos suportes para os magnetrões e para o “porta substratos”; a adição de dois controladores de fluxo de gás permitindo a introdução controlada de Árgon e de atmosfera activa de O2 ou N2 durante a deposição; e a adição de uma segunda fonte e controlador RF permitindo a co-deposição simultânea de filmes a partir de dois alvos diferentes. O estudo base sobre as condições de deposição e das características dos filmes finos resultantes em diferentes substratos foi efectuada a partir de uma extensa lista de alvos. Atenção particular foi dada à deposição de filmes finos das fases magnéticas de La1-xSrxMnO3, La1-xBaxMnO3 e da liga Ni2+x-yMn1-xGa1+y a partir dos correspondentes alvos La0.7Sr0.3MnO3; La0.7Ba0.3MnO3 e NiGa com NiMn. A caracterização estrutural das amostras foi efectuada com Difractometria por Raios-X (XRD) convencional e de elevada resolução; determinação da composição química foi essencialmente realizada por Espectroscopia de Dispersão de Electrões (EDS); medidas de magnetização foram executadas com recurso a um protótipo de Magnetometro por Vibração da Amostra (VSM) e as medidas de análise de superfície utilizaram Microscopia de Ponta (SPM) nas vertentes de piezo resposta (PFM) e de força magnética (MFM). Os resultados obtidos nos compósitos maciços (LuM+LSM e BTO+LBM) demonstram claramente que as amostras satisfazem os objectivos propostos em termos de composição pureza das fases, com eventual conteúdo em óxidos espúrios inferior a 0.5%. Imagens obtidas por SEM confirmam a compactação dos grãos e distribuição de tamanhos em torno dos 50 nm. Condutividade eléctrica, intensidade da magnetização e a dispersão da resposta em Magneto-Impedância são coerentes com a proporção relativa da fase magnética em cada amostra. A existência de um acoplamento entre as fases funcionais é evidenciada por medidas de efeito Magneto-Eléctrico na amostra “78%LuM+22%LSM” que apresenta uma resposta eléctrica de ~300% para 1 Tesla a 100 kHz; enquanto que na amostra “78%BTO+22%LBM” se assinala a transição estrutural da fase magnética a ~350 K resulta na inversão do comportamento do coeficiente ME. Um sistema de Medidas de Magneto-Resistência foi totalmente desenvolvido e montado desde a fase conceptual até ao estado operacional; permite testar amostras de 77 a 350 K em função do campo magnético até 1 Tesla, e rotação horizontal de 360º; o sistema foi também desenhado para poder efectuar medidas de efeito de Hall e permitir upgrades. Ao abrigo de protocolos de colaboração estabelecidos com diversas instituições nacionais e internacionais, foram realizados cursos de formação complementar e caracterização de amostras em técnicas como Magneto Resistência (MR), Magneto Impedância (MZ) e efeito Magneto Eléctrico (ME); Espectroscopia Raman e Fotoelectrónica de Raios-X (XPS); Magnetização via sistemas SQUID e VSM; Microscopia de Ponta em Piezo resposta (PFM) e Espectroscopia de excitação em largura de banda (BEPS); Espectroscopia de Rutherford por Retro dispersão (RBS); Difracção de Neutrões em pós (NPD) e Correlações de Perturbação Angular (PAC) Colaboração em projectos de investigação fora do âmbito dos materiais multiferróicos permitiu ampliar e versatilizar experiencia em técnicas de preparação e caracterização de amostras, nomeadamente medidas de VSM e XPS permitiram identificar os estados de oxidação dos clusters de iões de Ruténio que integram complexos moleculares utilizados em catalisadores; A certificação por XRD e SEM/EDS do conjunto dos alvos e amostragem dos substratos adquiridos implicou a devolução de alguns itens com por falta de conformidade com as especificações. Cooperação directa em projectos de investigação paralelos sobre materiais multiferróicos permitiu o acesso a amostras suplementares, nomeadamente a uma série nano pós de Y1-x-yCaxØyMn1O3 e de Eu0.8Y0.2MnO3; a series de compósitos microestruturados de LuMnO3 com La0.625Sr0.375MnO3 e de BaTiO3 com ferrites hexagonais; e a diversas amostras poli- e mono-cristalinas de Pr1-xCaxMnO3, La1-xSrxMnO3 e La1-xCaxMnO3.
FCT - SFRH/BD/25011/2005
APA, Harvard, Vancouver, ISO, and other styles
5

Valdes, Aguilar Rolando. "Electromagnons in multiferroic materials." College Park, Md.: University of Maryland, 2008. http://hdl.handle.net/1903/8851.

Full text
Abstract:
Thesis (Ph. D.) -- University of Maryland, College Park, 2008.
Thesis research directed by: Dept. of Physics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
APA, Harvard, Vancouver, ISO, and other styles
6

Kim, Jong-Woo. "Multiferroic hexagonal HoMnO3 films." Doctoral thesis, Göttingen Cuvillier, 2009. http://d-nb.info/99957177X/04.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Moraes, Leandro Aparecido Stepien de. "Efeito magnetoelétrico em óxidos de titânio antiferromagnéticos." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-17072015-121104/.

Full text
Abstract:
Materiais que apresentam um acoplamento entre as propriedades elétricas e magnéticas, conhecidos como magnetoelétricos, estão despertando a atenção da comunidade acadêmica nos últimos anos principalmente devido ao seu grande potencial tecnológico no desenvolvimento de materiais multifuncionais. Sendo um maior esforço concentrado na obtenção de novos materiais multiferróicos, que são aqueles que possuem duas ou mais ordens ferróicas, em especial os que apresentam ferroeletricidade e ferromagnetismo. Este trabalho tem como objetivo uma investigação das propriedades dielétricas e magnéticas de um grupo de materiais ainda pouco estudado a fim de se compreender os mecanismos responsáveis pelo efeito magnetoelétrico, de forma a contribuir com a pesquisa nessa área. As amostras estudadas são os óxidos de titânio e cromo Nd(1-x)A(x)CrTiO5 (A=Y, La) e GdCrTiO5, todos na forma de cerâmicas policristalinas monofásicas. Foram discutidas de que forma a diluição da subrede magnética do neodímio afeta o caráter magnetoelétrico observado nesse material e qual a importância de cada uma das subredes (Nd3+/Gd3+ e Cr3+) nas propriedades dielétricas e magnéticas. Verificamos que o efeito magnetoelétrico é sensível a variações na rede do Nd3+. Entretanto, nossos resultados no composto GdCrTiO5 indicam que as subredes magnéticas são pouco acopladas, o que indica que o ion Cr3+ talvez seja o responsável por dirigir o efeito magnetoelétrico nesta família de materiais.
The coupling of the electric and magnetic properties in the magnetoelectric compounds is attracting a great deal of interest in the scientific community due to the huge potential for application based on new multifunctional materials. Of special attention are the so-called multiferroics, materials that simultaneously show ferromagnetism and ferroelectricity. The main purpose of this work is the experimental investigation of the dielectric and magnetic properties of a relatively less known class of materials with the aim to identify the origin of the magnetoelectric coupling. We study the single phase polycrystalline compounds Nd(1-x)A(x)CrTiO5 (A=Y, La) and GdCrTiO5 and discuss the effect of dilution of the Nd3+ ions and the importance of each magnetic sublattice on the samples behavior. We find that the magnetoelectric effect is susceptible to changes in the Nd3+ site. At the same time, our results indicate that the two magnetic sublattice (Nd3+/Gd3+ and Cr3+) are only weakly coupled indicating that the Cr3+ magnetic sublattice might be responsible for driving the magnetoelectric effect in this family of compounds.
APA, Harvard, Vancouver, ISO, and other styles
8

Prokhorenko, Sergei. "Multiscale modeling of multiferroic nanocomposites." Thesis, Châtenay-Malabry, Ecole centrale de Paris, 2014. http://www.theses.fr/2014ECAP0045/document.

Full text
Abstract:
Au cours des dernières décennies, la recherche de nouveaux matériaux multiferroïques nanostructurés avec des propriétés optimisées a conduit à l'élaboration d'une grande variété de modèles théoriques et des approches de simulation. Allant des modèles ab initio capables de décrire les propriétés à la température nulle des composés artificiels monocristallins à des approximations phénoménologiques pour la description des composites à la mésoscopique, ces recherches ont soulevé la question fondamentale de la relation entre la géométrie de la structure des systèmes hétérogènes et les propriétés des leurs transitions de phase. Cependant, malgré des progrès significatifs en la matière,cette question n'a pas encore été élucidée et les relations entre les modèles à différentes échelles ne sont pas entièrement distingués. La présente étude est consacrée à lier l’ensemble des modèles décrivant les matériaux nanocomposites multiferroïques à différentes échelles. Tout d'abord, nous présentons un développement méthodologique de l'approche Hamiltonien effectif couramment utilisé pour étudier les transitions de phase structurales. Les modifications introduites permettent d'étendre cette méthode pour prédire les propriétés à la température finie des systèmes hétérogènes. Le modèle construit est ensuite utilisé pour étudier les propriétés des nanostructures et solutions solides (BiFeO3)(BaTiO3). Recourant à des simulations Monte-Carlo, nous montrons que notre modèle fournit des résultats qui sont en ligne avec les observations expérimentales récentes et qu’il permet de prédire théoriquement les propriétés d'une large gamme de systèmes avec différentes géométries composites. La deuxième partie de l'étude consiste en l'application de la théorie de Ginzburg-Landau des transitions de phase à l’étude des propriétés des multicouches ferroélectriques et ferromagnétiques avec des interfaces épitaxiales. Plus précisément, nous décrivons théoriquement l’effet magnétoélectrique exhibé par les hétérostructures autonomes Pb(Zr0.5 Ti0.5) O3-FeGaB et BaTiO3-FeGaB. Enfin, nous montrons que la géométrie multicouche d'un nanocomposite ferroélectrique et ferromagnétique ouvre la voie à une amélioration radicale du signal de charge de sortie
During past decades, the search for new nanostructured multiferroic materials with optimized properties has lead to the development of a vast variety of theoretical models and simulation approaches. Spreading from first principles based models able to describe zero-temperature properties of artificial single crystal compounds to phenomenological approximations for composites with mesoscale morphology, these investigations have raised the fundamental question of how the geometry of the structure affects the properties of phase transitions exhibited by heterogeneous systems. However, despite significant progress, the answer to this question still lacks clarity and the bridge connecting models at different scales is not fully constructed. The current study is devoted to linking together models of multiferroic nanocomposite materials applicable at different scales. First, we present a methodological development of effective Hamiltonian approach commonly used to study structural phase transitions. The introduced modifications allow to extend this widely used method to predict finite-temperature properties of compositionally heterogeneous systems. The constructed model is then used to study properties of (BiFeO3)(BaTiO3) nanostructures and solid-solutions. Resorting to Monte-Carlo simulations, we show that our model provides results that are in-line with recent experimental observations and allows to theoretically predict properties of a wide range of systems with different composite geometries. The second part of the study consists inapplication of Landau theory of phase transitions to investigate the properties of ferroelectric-ferromagnetic multilayerswith epitaxial interfaces. Specifically, we theoretically describe the strain-mediated direct ME effect exhibited byfree-standing Pb(Zr0.5 Ti0.5 )O3 -FeGaB and BaTiO3 -FeGaB heterostructures. Finally, we show that the multilayer geometry of a ferroelectric-ferromagnetic nanocomposite opens the way for a drastic enhancement of the output charge signal
APA, Harvard, Vancouver, ISO, and other styles
9

Onbaş̧lı, Mehmet Cengiz. "Magneto-optical and multiferroic oxide thin films, integrated nonreciprocal photonic devices and multiferroic memory devices." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98579.

Full text
Abstract:
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2015.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references.
Complex oxide thin films offer unique functionalities which can potentially extend the utility of current storage, processing and optical isolator technologies. In this thesis, we present three categories of studies on complex oxide growth using pulsed laser deposition (PLD) and structural, magnetic, magneto-optical and ferroelectric characterization. We first focused on enhancing integrated magneto-optical isolator performance by improving the growth method of magneto-optical Ce1Y2Fe5O12 (Ce:YIG) films. The spectral and substrate orientation dependence of the magneto-optical figure of merit of epitaxial Ce: YIG on GGG substrates show very high magneto-optical figure of merit (379-400° dB-1 at [lambda] = 1550 nm for all substrate orientations). The thermal budgets of Ce: YIG growth on ShN4 (2 high temperature PLD steps and a rapid thermal anneal, RTA), silicon-on-insulator substrates (a high and a low temperature PLD step and a RTA) and optical resonator chips (one PLD step, one RTA, YIG seed layer from the top) were progressively reduced to achieve improved integrated optical isolators with low insertion loss of 7.4 ± 1.8 dB and an isolation ratio of 13.0 ± 2.2 dB. We demonstrated that the ferrimagnetic insulator YIG thin films (Y3Fe5O12) epitaxially grown on GGG substrates achieve ultralow Gilbert damping of spin waves ([alpha] = 2.2-7 x 10-4 ), which enable em-long in-plane propagation of spin waves. This demonstration enables researchers to fabricate near-dissipationless magnon-based logic computers. Finally, we present a substitutionally-doped perovksite, STCo30 (Sr Ti0.70 CO0.30 O3-[delta]) integrated on Si, STO (100), and on Nb:STO substrates. This perovskite oxide has been found to exhibit ferroelectricity and magnetism at room temperature. Experimental results on magnetism, ferroelectricity and structure were reproduced using density functional theory simulations.
by Mehmet Cengiz Onbaş̧lı.
Ph. D.
APA, Harvard, Vancouver, ISO, and other styles
10

Dixit, Anant. "Relativistic effects : applications to multiferroic materials." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAE037/document.

Full text
Abstract:
Notre étude porte sur des matériaux à effets relativistes importants. L'hamiltonien semi-relativiste, couplé aux équations de Maxwell (EM), permet de déduire les sources de courant et de densité, incluant des termes de second ordre (polarisations de spin et de Darwin). Différents modèles sont développés par expansion des EM. L'étude ab initio montre que (1) le désordre atomique peut produire le ferrimagnétisme (FM) dans GaFeO3 (GFO) multiferroïque, (2) les états 3d Fe des octaèdres déformés ont une levée de dégénérescence tétraédrique (théorie du champ cristallin), (3) la polarisation électrique concorde avec l'expérience, (4) le mécanisme magnétoélectrique (ME) direct est insuffisant pour expliquer le ME observé. Pour Cr2O3, le calcul de l'état massif sous contraintes biaxiales n'explique pas son FM, la taille de l'échantillon ou l'excès d'oxygène pourrait de fait être important. Enfin, nous avons développé le XAS et le XMCD dans le code VASP et calculé ces spectres pour GFO
We studied the physics of materials where relativistic effects are important. We first coupled the semi-relativistic Hamiltonian with the Maxwell's equations, and derived the current and density sources, which included second-order terms like the spin and Darwin polarizations. Different models were developed, by expanding the Maxwell's equations. We then performed ab initio studies to explain (1) site disorders as the origin of ferrimagnetism in multiferroic GaFeO3 (GFO), (2) crystal-field theory where the Fe 3d states at the deformed octahedra have tetrahedral splittings, (3) the electric polarization as a function of temperature, and (4) the insufficiency of the direct magnetoelectric (ME) mechanism to explain observed ME behavior. For Cr2O3, bulk calculations for different biaxial strains failed to explain its ferromagnetism, indicating that size or excess-O effects might be important. Finally, we implemented XAS and XMCD in VASP and computed these spectra for GFO
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Multiferroic"

1

Bhargava, Gagan Kumar, Sumit Bhardwaj, Mahavir Singh, and Khalid Mujasam Batoo, eds. Ferrites and Multiferroics. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-7454-9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Algueró, Miguel, J. Marty Gregg, and Liliana Mitoseriu, eds. Nanoscale Ferroelectrics and Multiferroics. Chichester, UK: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781118935743.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Bochenek, Dariusz. Technologia wytwarzania i właściwości multiferroikowej ceramiki typu PFN: Manufacturing technology and properties of the multiferroic PFN ceramics = [Tekhnologii︠a︡ poluchenii︠a︡ i svoĭstva mulʹtiferroika na primere keramiki tipa PFN]. Katowice: Wydawnictwo Uniwersytetu Ślaskiego, 2012.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Wiraka, Haradewa Siṅgha, and Wolfgang Kleemann. Ferroics and multiferroics: Special topic volume with invited peer reviewed papers only. Zurich: Trans Tech Publications, 2012.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Oliveira, Antonella Carvalho de, ed. Refinamento estrutural e cálculos de densidade eletrônica no sistema multiferróico (Bi1-xNdx)(Fe1-yCoy)O3: -. Brasil: Atena Editora, 2023.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Pavlov, Sergey. Methods of catastrophe theory in the phenomenology of phase transitions. ru: INFRA-M Academic Publishing LLC., 2020. http://dx.doi.org/10.12737/1004276.

Full text
Abstract:
The monograph is devoted to describing the methods of catastrophe theory and building on the basis of these methods, phenomenological models of phase transitions in solids. Methods of constructing structurally stable normal forms of functions, including functions that are imposed on the symmetry conditions. The classification of phenomenological models of phase transitions for two interacting one-component order parameter, two-component and three-component order parameters the number of control parameters varied in the experiment. Theoretical dependence of the anomalies of the physical properties of the models are compared with experimental data in ferroelectrics, magnetic materials, solid solutions of rare earth metals, multiferroics and other solids that are experiencing phase transitions. For professionals in the field of solid state physics and phase transitions.
APA, Harvard, Vancouver, ISO, and other styles
7

Multiferroic Materials. Materials Research Forum LLC, 2023.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Wang, Junling. Multiferroic Materials. Taylor & Francis Group, 2021.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Multiferroic Materials. Materials Research Forum LLC, 2023.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Multifunctional Multiferroic Materials [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.97901.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Multiferroic"

1

Wang, Biao. "Multiferroic Materials." In Advanced Topics in Science and Technology in China, 377–441. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-33596-9_8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Peng, Wanjun, Ziyao Zhou, and Ming Liu. "Multiferroic Materials." In Integrated Multiferroic Heterostructures and Applications, 5–50. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2019. http://dx.doi.org/10.1002/9783527803675.ch2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Fang, Yue-Wen, Wen-Yi Tong, and Chun-Gang Duan. "Multiferroic Simulations." In Integrated Multiferroic Heterostructures and Applications, 121–55. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2019. http://dx.doi.org/10.1002/9783527803675.ch4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Wang, Zhiguang, Menghui Li, Tianxiang Nan, and Nianxiang Sun. "Multiferroic Sensors." In Integrated Multiferroic Heterostructures and Applications, 203–10. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2019. http://dx.doi.org/10.1002/9783527803675.ch7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Umeno, Yoshitaka, Takahiro Shimada, Yusuke Kinoshita, and Takayuki Kitamura. "Multiferroic Nanostructures." In Multiphysics in Nanostructures, 165–92. Tokyo: Springer Japan, 2017. http://dx.doi.org/10.1007/978-4-431-56573-4_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Hu, Zhongqiang, Qu Yang, Xinger Zhao, and Gail J. Brown. "Toward Multiferroic Memories." In Integrated Multiferroic Heterostructures and Applications, 175–202. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2019. http://dx.doi.org/10.1002/9783527803675.ch6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Martin, Lane W., Ying-Hao Chu, and R. Ramesh. "Emerging Multiferroic Memories." In Emerging Non-Volatile Memories, 103–66. Boston, MA: Springer US, 2014. http://dx.doi.org/10.1007/978-1-4899-7537-9_3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Salje, Ekhard. "Ferroic and Multiferroic Materials." In Handbook of Nanoscopy, 1273–301. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527641864.ch35.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Cheng, Yuxin, Weixiao Hou, Mingmin Zhu, Bin Peng, Ziyao Zhou, and Ming Liu. "Mechanisms of Multiferroic Material." In Integrated Multiferroic Heterostructures and Applications, 51–119. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2019. http://dx.doi.org/10.1002/9783527803675.ch3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Peng, Wanjun, Brandon Howe, and Xi Yang. "Multiferroic RF/Microwave Devices." In Integrated Multiferroic Heterostructures and Applications, 157–74. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2019. http://dx.doi.org/10.1002/9783527803675.ch5.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Multiferroic"

1

DeGiorgi, Virginia G., Peter Finkel, Lauren Garten, and Margo Staruch. "Transduction Using Functional Materials: Basic Science and Understanding at the U. S. Naval Research Laboratory." In ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/smasis2019-5501.

Full text
Abstract:
Abstract Recently NRL researchers have embarked on a basic research effort “Tuning Giant Magnetoelectric Properties in Phase Transformation Multiferroics” focused on multifunctional materials for energy transduction and conversion. Multiferroic materials combine at least two coupled ferroic properties and are used in multiple applications including magnetic field sensors, energy harvesting devices, non-volatile memory and antennas. There are very few single phase multiferroic materials, and they normally have relatively low magnetoelectric (ME) coupling coefficient. In contrast, engineered materials such as ME composites fabricated from piezoelectric and magnetostrictive materials can show multiple orders of magnitudes increase in the ME coupling coefficient. The optimal design of ME composites would lead to conditions of maximum response (strain, induced voltage, or field) with minimum applied electric or magnetic fields, providing advanced materials for transduction, sensing, energy harvesting and other applications. That is why NRL researchers are working on piezoelectric materials with enhanced properties due to a phase transformation that would minimize the stimuli needed to achieve large strains. Key to the successful design and fabrication of ME composites is an understanding of interface characteristics as well as individual material components. In this paper we will review the current status of work at NRL on engineered multiferroic composites comprised of piezoelectric and magnetostrictive materials coupled through strain. There are still many open questions about the interfacial properties as well as the individual component materials. Details will be presented from recent work on material characterization under repetitive cycling, interface characteristics, and stress/electric/thermal effects on driving the phase transition in a relaxor ferroelectric single crystal.
APA, Harvard, Vancouver, ISO, and other styles
2

Bhasin, Tanvi, Ashish Agarwal, Sujata Sanghi, Manisha Yadav, Muskaan Tuteja, and Jogender Singh. "Improved multiferroic properties of cobalt ferrite and sodium bismuth titanate based multiferroic composites." In DAE SOLID STATE PHYSICS SYMPOSIUM 2018. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5113318.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Kaswan, Kavita, Ashish Agarwal, Sujata Sanghi, and Jogender Singh. "Improved multiferroic properties of bismuth ferrite and sodium bismuth titanate based multiferroic composites." In DAE SOLID STATE PHYSICS SYMPOSIUM 2018. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5113332.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Lee, Y. P., Y. J. Yoo, Y. J. Kim, H. M. Son, and J. S. Hwang. "Flexible metamaterials, comprising multiferroic films." In 2016 IEEE International Electron Devices Meeting (IEDM). IEEE, 2016. http://dx.doi.org/10.1109/iedm.2016.7838364.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Roy, Subhasis, Bulbul Biswas, S. B. Majumder, Shyamalendu M. Bose, S. N. Behera, and B. K. Roul. "Investigations on Flexible Multiferroic Composites." In MESOSCOPIC, NANOSCOPIC AND MACROSCOPIC MATERIALS: Proceedings of the International Workshop on Mesoscopic, Nanoscopic and Macroscopic Materials (IWMNMM-2008). AIP, 2008. http://dx.doi.org/10.1063/1.3027171.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Dey, K., S. Majumdar, and S. Giri. "Dielectric response in multiferroic Bi0.3Ba0.15Pb0.15FeO3." In SOLID STATE PHYSICS: Proceedings of the 56th DAE Solid State Physics Symposium 2011. AIP, 2012. http://dx.doi.org/10.1063/1.4710342.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Fiebig, Manfred. "Nonlinear Optics of Multiferroic Materials." In 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE, 2019. http://dx.doi.org/10.1109/cleoe-eqec.2019.8872480.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Domann, John P. "Microscale multiferroic motors (Conference Presentation)." In Active and Passive Smart Structures and Integrated Systems XII, edited by Alper Erturk. SPIE, 2018. http://dx.doi.org/10.1117/12.2296643.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Rader, Claire, Megan F. Nielson, Brittany E. Knighton, Aldair Alejandro, and Jeremy A. Johnson. "2D THz Measurement of Magnon-Phonon Coupling in Multiferroic BiFeO3." In CLEO: Fundamental Science. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/cleo_fs.2023.ff1g.4.

Full text
Abstract:
With 2D THz spectroscopy we directly measure magnon-phonon coupling in multiferroic BiFeO3. Using theoretical modeling, we are able to decipher different types of coupling that appear in 2D spectral features.
APA, Harvard, Vancouver, ISO, and other styles
10

Lee, J., D. Talbayev, C. L. Zhang, X. S. Xu, S. W. Cheong, A. J. Taylor, and R. P. Prasankumar. "Ultrafast Polaron Dynamics in Multiferroic LuFe2O4." In International Conference on Ultrafast Phenomena. Washington, D.C.: OSA, 2010. http://dx.doi.org/10.1364/up.2010.mg6.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Multiferroic"

1

Carman, Greg P., Gavin Chang, and Grayson Bush. Modeling Multiferroic Materials. Fort Belvoir, VA: Defense Technical Information Center, September 2007. http://dx.doi.org/10.21236/ada472800.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Yarotski, Dmitry Anatolievitch. Multiferroic Response Engineering in Mesoscale Oxide Structures. Office of Scientific and Technical Information (OSTI), October 2016. http://dx.doi.org/10.2172/1329701.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Saxena, Avadh. Mesoscopic modeling of ferroic and multiferroic materials. Office of Scientific and Technical Information (OSTI), January 2017. http://dx.doi.org/10.2172/1338789.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Tyson, Trevor A. Exploring Electric Polarization Mechanisms in Multiferroic Oxides. Office of Scientific and Technical Information (OSTI), January 2017. http://dx.doi.org/10.2172/1340525.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Haraldsen, Jason T. Understanding the magnetic ground states for improper multiferroic materials. Office of Scientific and Technical Information (OSTI), April 2013. http://dx.doi.org/10.2172/1073745.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Srinivasan, Gopalan. Ferrite-Ferroelectric Heteroepitaxial Structures and Frequency Agile Multiferroic RF Components. Fort Belvoir, VA: Defense Technical Information Center, November 2012. http://dx.doi.org/10.21236/ada568087.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Ahmed, M. A., M. S. Ayoub, M. M. Mostafa, and M. M. El-Desoky. Structural and multiferroic properties of nanostructured barium doped Bismuth Ferrite. Edited by Lotfia Elnai and Ramy Mawad. Journal of Modern trends in physics research, December 2014. http://dx.doi.org/10.19138/mtpr/(14)81-89.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Wuttig, Manfred. POLYMERIC MULTIFERROIC, COLLABORATIVE RESEARCH BETWEEN UNIVERSITY OF MARYLAND AND KANSAS UNIVERSITY. Office of Scientific and Technical Information (OSTI), November 2016. http://dx.doi.org/10.2172/1333693.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

O'Connor, Charles J., Leszek Malkinski, and N. Babu. Nanoscale Engineering of Multiferroic Hybrid Composites for Micro- and Nano-scale Devices. Fort Belvoir, VA: Defense Technical Information Center, September 2012. http://dx.doi.org/10.21236/ada568709.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Clune, A., K. Hughey, J. L. Musfeldt, W. Tian, J. Fernandez-Baca, and John Singleton. Magnetostructural Phase Diagram of Multiferroic (ND4)2FeCl5.H2O. Office of Scientific and Technical Information (OSTI), February 2017. http://dx.doi.org/10.2172/1343728.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Multiferroic' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography