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Dissertations / Theses on the topic 'Magnetic Perovskite Oxides'

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Published: 4 June 2021
Last updated: 6 September 2023

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1

Baskar, Dinesh. "High temperature magnetic properties of transition metal oxides with perovskite structure /." Thesis, Connect to this title online; UW restricted, 2008. http://hdl.handle.net/1773/9812.

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2

Tseggai, Mehreteab. "Synthesis, Nuclear Structure, and Magnetic Properties of some Perovskite Oxides." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4826.

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3

Kususe, Yoshiro. "Synthesis, Structure, and Properties of Eu2+-containing Perovskite Oxides." 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/199320.

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4

Awin, Labib Ali Mohamed. "Structural, Magnetic And Electrical Studies On Some Mixed Metal Perovskite Oxides." Thesis, The University of Sydney, 2013. http://hdl.handle.net/2123/9531.

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This thesis describes crystallographic, magnetic and electrical studies of some mixed metal perovskites. In the first part, the charge distribution, magnetic and electrical properties of mixed metal rhodium-copper perovskite oxides were investigated. Various series with the general formula Ln1-yAyRh1-2xCuxBxO3 in which (Ln = La3+, Tb3+; A = Ca2+, Sr2+, Pb2+, Bi3+; B = Sc3+, Cu2+, Zn2+ ; y ≤ 0.3, x ≤ 0.25), have been synthesised by solid state reaction, and characterised by X-ray diffraction, scanning electron microscopy and physical property measurements and, as available, neutron diffraction
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5

Injac, Sean Dusan Alexander. "Structural and Magnetic Characterisation of 4d and 5d Mixed Metal Oxides." Thesis, The University of Sydney, 2019. https://hdl.handle.net/2123/21640.

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Advanced functional materials showing magnetic properties are a cornerstone of modern information technologies, and are keenly studied in order to search for useful materials within emerging technologies, such as spintronics, applied superconductivity and quantum computing. Magnetic materials containing the heavy 4d and 5d metals are relatively understudied compared to their 3d counterparts and are a promising avenue of study in this search for novel functional materials. This work presents the synthesis, structural, and magnetic characterisation of a number of novel 4d and 5d metal oxides wi
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6

Xiong, Jie. "Investigation of Structural and Magnetic Properties of Perovskite Type Oxides Containing 5d Ions." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492623459123207.

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7

Joseph, J. V. L. "Synthesis, characterization and magnetic properties of substituted perovskite - type manganates and related oxides." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2004. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2907.

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8

Raisch, Christoph Werner [Verfasser], and Thomas [Akademischer Betreuer] Chassé. "Investigations of the electronic, magnetic and crystalline structure of perovskite oxides and an oxide-oxide interface / Christoph Werner Raisch ; Betreuer: Thomas Chassé." Tübingen : Universitätsbibliothek Tübingen, 2013. http://d-nb.info/1162844124/34.

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9

Liu, Qiang. "Synthesis, characterization and investigation on the magnetic and electronic structure of strontium iron oxides." Thesis, Bordeaux 1, 2013. http://www.theses.fr/2013BOR14772/document.

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Les diverses perovskites de strontium-fer présentent de très fortes corrélations entre la structurecristalline et les phénomènes d’ordre de lacunes d’oxygènes, de charge, de spin et d’orbitales. Danscette thèse, nous avons réalisé une étude systématique des relations entre les ordres de charges etles ordres de spins selon les différents environnements cristallographiques rencontrés pour lescations Fe3+ et Fe4+ dans la phase Sr4Fe4O11, pour le cation Fe3+ dans les phases Sr3Fe2O6 et Sr2Fe2O10et pour le cation Fe2+ dans la phase SrFeO2. Les synthèses des phases polycristallines furent réaliséesv
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10

Gonano, Bruno. "Influence des ions sulfates sur la physico-chimie d'oxydes de fer type perovskite." Thesis, Normandie, 2017. http://www.theses.fr/2017NORMC222/document.

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Au cours de cette étude, nous avons montré que dans les oxydes de fer type perovskite, les ions sulfates (SO42-) pouvaient être utilisés à escient pour apporter de l'anisotropie cristalline et électronique ou bien au contraire pour casser les mises en ordre à longue distance et provoquer l'isotropie du matériau. Ainsi, ce travail a permis d'isoler les composés bidimensionnels : Sr4Fe2.5-x□xO7.25-(3x/2)(SO4)0.5 (avec x=0, 0.25 et 0.5). Ils peuvent être décrits comme une intercroissance SrO/SrFeO2,5/SrFe0,5-x□xO1,25-(3x/2)(SO4)0,5/SrFeO2,5 et cristallisent dans une maille moyenne quadratique I4/
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11

Erten, Onur. "Electronic and Magnetic Properties of Double Perovskites and Oxide Interfaces." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1376496346.

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12

Zong, Yanhua. "Magnetic and magnetodielectric properties of Eu2+-containing oxides." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/126809.

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13

Johnston, Karen Elizabeth. "A complementary study of perovskites : combining diffraction, solid-state NMR and first principles DFT calculations." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/1837.

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Perovskites, ABX₃, and their associated solid-solutions are a particularly important and attractive area of research within materials chemistry. Owing to their structural and compositional flexibility and potential physical properties they are one of the largest classes of materials currently under investigation. This thesis is concerned with the synthesis and structural characterisation of several perovskite-based materials using a combined approach of high-resolution synchrotron X-ray and neutron powder diffraction (NPD), solid-state Nuclear Magnetic Resonance (NMR) and first-principles Dens
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14

Er-Rakho, Lahcen. "Oxydes de cuivre a valence mixte : perovskites deficitaires en oxygene." Caen, 1987. http://www.theses.fr/1987CAEN2036.

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Mise en evidence et etude de deux grandes familles de composes dans le systeme la::(2)o::(3)-ao-cuo(a=ca,ba,sr) : la::(2-x)ba::(1-x)cu::(1-x/2)o::(5-x)(ln=la,nd) ou cu est essentiellement au degre d'oxydation 2 et une seconde famille caracterisee par la valence mixte du cuivre, les quantites de cuivre 3 pouvant atteindre dans certains cas 40%. Tous ces oxydes ont en commum leur appartenance a la structure perovskite. Proprietes electriques et magnetiques
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15

Kirilmaz, Ozan Seyitali [Verfasser], and Ralph [Gutachter] Claessen. "Thin Film Growth and Characterization of the Transition Metal Oxides Magnetite and Layered Perovskite Iridates / Ozan Seyitali Kirilmaz ; Gutachter: Ralph Claessen." Würzburg : Universität Würzburg, 2019. http://d-nb.info/1182902820/34.

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16

SILVA, RENILSON A. da. "Estudo de interacoes hiperfinas eletromagneticas em oxidos perovskitas do tipo RCrOsub(3)(R=Gd, Tb e Dy)." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9480.

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Made available in DSpace on 2014-10-09T12:27:11Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:57:37Z (GMT). No. of bitstreams: 0<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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17

Shafeie, Samrand. "Structure and Properties Investigations of the La2Co1+z(Ti1-xMgx)1-zO6 Perovskite System." Licentiate thesis, Stockholms universitet, Institutionen för material- och miljökemi (MMK), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-55418.

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Perovskite based materials have great potentials for various energy applications and the search for new materials for uses in SOFCs has largely been concentrated to this class of compounds. In this search, we have studied perovskite phases in the system La2Co1+z(Ti1-xMgx)1-zO6, with 0  x 0.9 and z = 0.0, 0.2, 0.4, 0.6. Crystal structures were characterized by XRD and, for selected compositions, also by NPD and SAED. They exhibit with increasing x, as well as increasing z, a progressive increase in symmetry from monoclinic to orthorhombic to rhombohedral. The main focus in this work has been on
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18

JUNQUEIRA, ASTROGILDO de C. "Estudo de interacoes hiperfinas em oxidos perovskitas do tipo La(MT)Osub(3) (MT=metais de transicao Fe, Cr, Mn e Co)." reponame:Repositório Institucional do IPEN, 2004. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11242.

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19

Manna, Kaustuv. "Evolution of the Magnetic Ground States with Lattice Distortion and Chemical Inhomogeneity in Doped Perovskite Oxides." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3422.

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The physics of doped transition metal perovskite has been an area of intense research in the last few decades due to their interesting magnetic and transport properties. Various exciting phenomena such as, colossal magneto resistance, high Tc superconductivity, multiferroicity, ferroelectricity, high temperature ferromagnetism, etc., have made these systems more fascinating in terms of fundamental study as well as technological applications. There are several intrinsic material characteristics in these perovskite oxides that can impact their magnetic properties. Lattice distortion and chemical
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20

Manna, Kaustuv. "Evolution of the Magnetic Ground States with Lattice Distortion and Chemical Inhomogeneity in Doped Perovskite Oxides." Thesis, 2013. http://etd.iisc.ernet.in/2005/3422.

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The physics of doped transition metal perovskite has been an area of intense research in the last few decades due to their interesting magnetic and transport properties. Various exciting phenomena such as, colossal magneto resistance, high Tc superconductivity, multiferroicity, ferroelectricity, high temperature ferromagnetism, etc., have made these systems more fascinating in terms of fundamental study as well as technological applications. There are several intrinsic material characteristics in these perovskite oxides that can impact their magnetic properties. Lattice distortion and chemical
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21

Lee, Alfred K. "Low temperature scanned probe microscopy studies of magnetic oxides." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-05-2856.

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This dissertation is divided into two parts. In the first, the general paradigm of scanned probe microscopy is outlined with a focus on atomic force microscopy and a few of its variations. Magnetic force microscopy is covered in detail as it forms the basis of the second part of this dissertation. The core elements and extra features of the instrument are described with attention paid to the upgrades made by the author. In the second part of this dissertation, background information on perovskite oxides and the inverse spinel system, magnetite, is given. Magnetic force microscopy studies were
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22

Denyszyn, Jonathan Charles. "The dielectric behavior of perovskite-related manganese oxides with stretched bonds or multiferroic properties." Thesis, 2006. http://hdl.handle.net/2152/2859.

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23

Chi-Wen, Chu, and 朱繼文. "Magnetoresistance in Perovskite Structure Oxides at High Temperature and Low Magnetic Fields." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/21897702386417931768.

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碩士<br>義守大學<br>材料科學與工程學系<br>88<br>In this research，the magnetoresistence behavior and microstructure have studied for the A-site ion (Ca2+)deficient La-Ca-Mn-O materials。The bulk prepared by conventional powder metaullurgy processes and films were deposition by DC sputtering。The Ca2+ deficient for La0.67CaXMnO3-X bulk material with x=0.2 and 0.1 decrease the resistivity and raise the semiconductor-material transition temperature near room temperature，the La0.67CaXMnO3-X thin films decreased The MR % increased from 72 ﹪、108 ﹪and 134 ﹪as the content of Ca2+ decreased from 0.33、0.2 and 0.1。 The L
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24

Laha, Sourav. "Exploring Transition Metal Oxides Towards Development of New Functional Materials : Lithium-ion Battery Cathodes, Inorganic Pigments And Frustrated Magnetic Perovskite Oxides." Thesis, 2016. http://etd.iisc.ac.in/handle/2005/2712.

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Transition metals (TMs) are ‘elements whose atoms have partially filled d-shell, or which can give rise to cations with an incomplete d-shell’. In TMs, the d-shell overlaps with next higher s-shell. Most of the TMs exhibit more than one (multiple) oxidation states. Some TMs, such as silver and gold, occur naturally in their metallic state but, most of the TM minerals are generally oxides. Most of the minerals on the planet earth are metal oxides, because of large free energies of formation for the oxides. The thermodynamic stability of the oxides is determined from the Ellingham diagram. Ellin
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25

Laha, Sourav. "Exploring Transition Metal Oxides Towards Development of New Functional Materials : Lithium-ion Battery Cathodes, Inorganic Pigments And Frustrated Magnetic Perovskite Oxides." Thesis, 2016. http://etd.iisc.ernet.in/handle/2005/2712.

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Transition metals (TMs) are ‘elements whose atoms have partially filled d-shell, or which can give rise to cations with an incomplete d-shell’. In TMs, the d-shell overlaps with next higher s-shell. Most of the TMs exhibit more than one (multiple) oxidation states. Some TMs, such as silver and gold, occur naturally in their metallic state but, most of the TM minerals are generally oxides. Most of the minerals on the planet earth are metal oxides, because of large free energies of formation for the oxides. The thermodynamic stability of the oxides is determined from the Ellingham diagram. Ellin
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26

Monti, Mark Charles. "The effect of epitaxial strain and R³+ magnetism on the interfaces between polar perovskites and SrTiO₃." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-05-3231.

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We have embarked on a systematic study of novel charge states at oxide interfaces. We have performed pulsed laser deposition (PLD) growth of epitaxial oxide thin films on single crystal oxide substrates. We studied the effects of epitaxial strain and rare-earth composition of the metal oxide thin films. We have successfully created TiO₂ terminated SrTiO₃ (STO) substrates and have grown epitaxial thin films of LaAlO₃ (LAO), LaGaO₃ (LGO), and RAlO₃ on STO using a KrF pulsed excimer laser. Current work emphasizes the importance of understanding the effect of both epitaxial strain and R³+ magnetis
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27

Bern, Francis. "Electric and Magnetic Coupling Phenomena at Oxide Interfaces." 2017. https://ul.qucosa.de/id/qucosa%3A21423.

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Perovskit-Oxide weisen eine große Bandbreite an physikalischen Eigenschaften bei gleichzeitig hoher struktureller Qualität in kleinsten Dimensionen auf. Die dramatischen Veränderungen ihrer Eigenschaften bei nur geringer Variation der stöchiometrischen Zusammensetzung sind sowohl für ein tieferes physikalisches Verständnis als auch für mögliche Anwendungsperspektiven interessant. In der vorliegenden Arbeit wurde der Einfluss von Ladungsübertragung an Grenz- flächen, Anisotropiemodifikation durch Verspannung und Oberflächeneffekte sowie magnetische und strukturelle Kopplung untersucht. Aufgrund ihre
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28

Jiwuer, Jilili. "Manganites in Perovskite Superlattices: Structural and Electronic Properties." Diss., 2016. http://hdl.handle.net/10754/616923.

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Perovskite oxides have the general chemical formula ABO3, where A is a rare-earth or alkali-metal cation and B is a transition metal cation. Perovskite oxides can be formed with a variety of constituent elements and exhibit a wide range of properties ranging from insulators, metals to even superconductors. With the development of growth and characterization techniques, more information on their physical and chemical properties has been revealed, which diversified their technological applications. Perovskite manganites are widely investigated compounds due to the discovery of the colossal magn
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29

Kirilmaz, Ozan Seyitali. "Thin Film Growth and Characterization of the Transition Metal Oxides Magnetite and Layered Perovskite Iridates." Doctoral thesis, 2019. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-178917.

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This thesis describes the growth and characterization of both the all-oxide heterostructure Fe3O4/ZnO and the spin-orbit coupling driven layered perovskite iridates. As for Fe3O4/ZnO, the 100% spin-polarized Fe3O4 is a promising spin electrode candidate for spintronic devices. However, the single crystalline ZnO substrates exhibit different polar surface termination which, together with substrate preparation method, can drastically affect the physical properties of Fe3O4/ZnO heterostructures. In this thesis two different methods of substrate preparation were investigated: a previously used in
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30

Das, Ranjan. "Optoelectronic and Magnetic Properties of 2D Layered Organic-Inorganic Hybrids and Selected Transition Metal Oxides." Thesis, 2022. https://etd.iisc.ac.in/handle/2005/6164.

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Perovskites with the general chemical formula ABX3 can be categorized into oxides and halides depending on the nature of the X anion. 3D organic-inorganic halide perovskites are extensively studied in the context of solar cell and photo- and electro-luminescence applications due to their outstanding optoelectronic properties, while oxide perovskites have attracted a great deal of attention for their many interesting physical properties such as structural, electrical, magnetic, and magnetocaloric effects. More recently, 2D layered organic-inorganic hybrid (OIH) materials have emerged as a new c
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31

Chiou, Kuan-Ru, and 邱冠儒. "(1) Synthesis and Electrical Properties of Complex Double Perovskites Oxides : Ba2LnTO6 (T = Mo and Ru, Ln = Nd, Sm, Eu, Gd, Dy and Y) and (2) Spin-transfer torques in one-dimensional magnetic tunneling junctions of lateral structures." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/egjeyv.

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博士<br>國立臺灣大學<br>物理學研究所<br>107<br>High dielectric constant and low dielectric loss are of great importance for the energy saving and efficient power delivery. This thesis aims to investigate fundamental frequency dependent dielectric properties and high-k dielectric constant in the double perovskites related oxides. Throughout this thesis, we have observed the role of the oxygen stoichiometry and polarization on the dielectric properties of the double perovskites oxides, allowing a great understanding of the synthesis condition and polarization mechanisms. In the first section of the t
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