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Дисертації з теми "Magnetic materials with perpendicular magnetic anisotropy"

Автор: Grafiati

Опубліковано: 20 квітня 2024

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1

Rasin, Boris. "Perpendicular magnetic anisotropy in ion beam sputtered Co/Ni multilayers." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/58071.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2009.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 34-35).<br>Co/Ni multilayers display perpendicular magnetic anisotropy and have applications in magnetic devices that could lead to a large increase in the density of magnetic storage. Co/Ni 10-(2 Å Co/ 8Å Ni) and 10-(2 Å Co/ 4 Å Ni) multilayers were deposited with ion beam sputtering on either ion beam sputtered copper or direct current magnetron sputtered gold buffer layers of various thicknesses. The effec

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2

Niesen, Alessia [Verfasser]. "Heusler materials with perpendicular magnetic anisotropy. Thin films for spintronics / Alessia Niesen." Bielefeld : Universitätsbibliothek Bielefeld, 2019. http://d-nb.info/1183256590/34.

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3

Gottwald, Matthias. "Nouveaux systèmes modèles à aimantation perpendiculaire pour l'étude des effets de transfert de spin." Thesis, Nancy 1, 2011. http://www.theses.fr/2011NAN10053/document.

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Анотація:

Les effets de transfert de spin sont devenus un sujet de recherche majeur ces quinze dernières années. Cependant, un manque de vérifications expérimentales pour beaucoup de modèles décrivant les effets de transfert de spin peut être constaté. Ceci est surtout lié à un manque de systèmes magnétiques modèles permettant un contrôle précis des paramètres pertinents utilisés dans les modèles théoriques. Dans ce travail deux systèmes magnétiques à aimantation perpendiculaire ont été analysés : les alliages amorphes de Co1-xTbx élaborés par pulvérisation cathodique et les super-réseaux [Co/Ni](111) é

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4

Kane, Margaret Marie. "Fabrication and characterization of perpendicular magnetic anisotropy thin-film CoCrPt grown on a Ti underlayer." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98555.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2015.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 57-58).<br>CoCrPt has potential applications as a memory storage technology because of its perpendicular magnetic anisotropy (PMA) characteristics. An underlayer can be used to ensure the out-of-plane magnetization required for PMA funct

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5

Zhang, Jinshuo Ph D. Massachusetts Institute of Technology. "Geometrical control of domain walls and the study of domain wall properties of materials with perpendicular magnetic anisotropy." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/108968.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 155-168).<br>Magnetic based devices such as hard disk drives (HDDs) are widely used in the computer industry because of their high memory capacity, non-volatility and low cost compared to semiconductor-based solid state disk drives (SSDs). However, they also suffer from low energy efficiency and low speed, due to the requirement for mechanical motion in order to access the data. In my thesis, I will

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6

Wismayer, Matthew P. "Small angle neutron scattering studies of magnetic recording media." Thesis, St Andrews, 2008. http://hdl.handle.net/10023/471.

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7

Nguyen, Ngoc-Minh. "Propagation de parois magnétiques dans des films et des pistes à anisotropie magnétique perpendiculaire." Thesis, Paris 11, 2012. http://www.theses.fr/2012PA112356.

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Анотація:

Cette thèse est consacrée à l’étude des mécanismes de propagation de parois magnétiques dans des films et des pistes magnétiques basés sur des matériaux à anisotropie magnétique perpendiculaire qui sont très prometteurs pour les mémoires magnétiques non volatiles d’ultra haute densité. Je me suis principalement intéressé à l’influence des défauts structuraux sur les mécanismes de dépiegeage de parois en utilisant la technique de microscopie Kerr ainsi que des mesures de transport. Trois résultats importants ont été mis en évidence : (1) Dans des vannes de spin de type CoNi/Cu/CoNi, il existe u

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8

Marcon, Paul. "Calcul ab-initio des propriétés physiques d'hétérostructures associant des matériaux ferromagnétiques à anisotropie magnétique perpendiculaire et des dichalcogénures de métaux de transition." Electronic Thesis or Diss., Toulouse 3, 2023. http://www.theses.fr/2023TOU30273.

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Анотація:

La possibilité de synthétiser des hétérostructures formées de matériaux 2D offre des perspectives majeures pour l'amélioration des composants spintroniques actuels ou la réalisation de nouveaux dispositifs. Le contrôle et la bonne compréhension des propriétés physiques de ces systèmes constituent de fait un enjeu technologique majeur. Au cours de cette thèse, nous avons étudié, à l'aide de calculs ab initio basés sur la théorie de la fonctionnelle de la densité (DFT), des hétérostructures formées de monocouches de dichalcogénures de métaux de transition (TMDCs) et de cristaux ferromagnétiques

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9

Kugler, Zoe [Verfasser]. "Perpendicular anisotropy in magnetic tunnel junctions / Zoe Kugler." Bielefeld : Universitätsbibliothek Bielefeld, Hochschulschriften, 2012. http://d-nb.info/1023862891/34.

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10

Moutafis, Christoforos. "Magnetic elements with perpendicular anisotropy : statics and dynamics of magnetic bubbles and vortices." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.611377.

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11

Gopman, Daniel Bernard. "Switching distributions in Co-Ni nanopillars with perpendicular magnetic anisotropy." Thesis, New York University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3614870.

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Анотація:

<p> This thesis reports on measurements of the switching distributions in Co-Ni nanopillars with perpendicular magnetic anisotropy. The Co-Ni nanopillars are incorporated into a spin-valve device - a two terminal device consisting of two ultrathin (1-3 nm) Co-Ni ferromagnets separated by a thin (4 nm) Cu spacer patterned into ellipses and circles with lateral sizes ranging from 40-300 nm. Magnetic fields applied along the uniaxial anisotropy axis can switch the alignment of the constituent ferromagnetic layers between anti-parallel and parallel. Electric currents flowing can also switch the na

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12

Almasi, H., C. L. Sun, X. Li, et al. "Perpendicular magnetic tunnel junction with W seed and capping layers." AMER INST PHYSICS, 2017. http://hdl.handle.net/10150/624048.

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We present a study on perpendicular magnetic tunnel junctions with W as buffer and capping layers. A tunneling magnetoresistance of 138% and an interfacial magnetic anisotropy of 1.67 erg/cm(2) were obtained in optimally annealed samples. However, after extended annealing at 420 degrees C, junctions with W layers showed extremely small resistance due to interdiffusion of W into the MgO barrier. In contrast, in Ta-based junctions, the MgO barrier remained structurally stable despite disappearance of magnetoresistance after extended annealing due to loss of perpendicular magnetic anisotropy. Com

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13

Zhang, Yue. "Modélisation compacte et conception de circuit hybride pour les dispositifs spintroniques basés sur la commutation induite par le courant." Phd thesis, Université Paris Sud - Paris XI, 2014. http://tel.archives-ouvertes.fr/tel-01058504.

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Анотація:

La miniaturisation du nœud technologique de CMOS en dessous de 90 nm conduit à une forte consommation statique pour les mémoires et les circuits logiques, due aux courants de fuite de plus en plus importants. La spintronique, une technologie émergente, est d'un grand intérêt pour remédier à ce problème grâce à sa non-volatilité, sa grande vitesse d'accès et son intégration facile avec les procédés CMOS. Comparé à la commutation induite par le champ magnétique, le transfert de spin (STT), une approche de commutation induite par le courant, non seulement simplifie le processus de commutation mai

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14

Almasi, Hamid, and Hamid Almasi. "Perpendicular Magnetic Tunnel Junctions with MgO Tunnel Barrier." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/626332.

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Анотація:

Spintronics discusses about fundamental physics and material science in mostly nanometer size structures. Spintronics also delivers many promising technologies for now and the future. One of the interesting spintronic structures is called “Magnetic Tunnel junction” (MTJ). A typical MTJ consists of a thin (1-3nm) insulator layer sandwiched between two ferromagnetic layers. In this work, I present MTJ with perpendicular magnetic anisotropy (PMA) using an MgO tunnel barrier. The effect of different heavy metals (HMs) adjacent to the ferromagnets (FMs) on tunneling magnetoresistance (TMR) and PMA

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15

Mohseni, Armaki Seyed Majid. "Spin valves and spin-torque oscillators with perpendicualr magnetic anisotropy." Doctoral thesis, KTH, Materialfysik, MF, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-105223.

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Анотація:

Researches in spintronics, especially those remarkably classified in the current induced spin-transfer torque (STT) framework, circumvent challenges with different materials and geometries. Perpendicular magnetic anisotropy (PMA) materials are showing capability of holding promise to be employed in STT based spintronics elements, e.g. spin-torque oscillators (STOs), STT-magnetoresistive random access memories (STT-MRAMs) and current induced domain wall motion elements. This dissertation presents experimental investigations into developing sputter deposited Co/Ni multilayers (MLs) with PMA and

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16

Vopsaroiu, Marian. "Anisotropy and texture studies in magnetic media." Thesis, University of Central Lancashire, 2002. http://clok.uclan.ac.uk/20302/.

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Анотація:

The rapid development of magnetic materials for recording media applications increased the demands for new and more precise experimental investigation techniques. In respect with these demands, this project is focused on experimental analyses of advanced particulate media and magnetic thin film samples. A new extended rotational remanence technique for anisotropy field measurements was developed. The technique is suitable for samples that contain aligned or partially aligned particles and provides both: in-plane anisotropy field distributions and the in-plane anisotropy field. This technique w

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17

Jaiswal, Samridh [Verfasser]. "Investigation of the Dzyaloshinskii-Moriya interaction and perpendicular magnetic anisotropy in magnetic thin films and nanowires / Samridh Jaiswal." Mainz : Universitätsbibliothek Mainz, 2018. http://d-nb.info/116285913X/34.

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18

Huang, Efrem Yuan-Fu. "L10-Ordered Thin Films with High Perpendicular Magnetic Anisotropy for STT-MRAM Applications." Research Showcase @ CMU, 2016. http://repository.cmu.edu/dissertations/880.

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Анотація:

The objective of the research conducted herein was to develop L10-ordered materials and thin film stack structures with high perpendicular magnetic anisotropy (PMA) for spin-transfertorque magnetoresistive random access memory (STT-MRAM) applications. A systematic approach was taken in this dissertation, culminating in exchange coupled L10-FePt and L10- MnAl heterogeneous structures showing great promise for developing perpendicular magnetic tunnel junctions (pMTJs) with both high thermal stability and low critical switching current. First, using MgO underlayers on Si substrates, sputtered MnA

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19

Fard, Samad Moemen Bellah. "Modelling anisotropy in electrotechnical steels." Thesis, Cardiff University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263551.

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20

Kuhrau, Susanne [Verfasser], and Hans Peter [Akademischer Betreuer] Oepen. "Surface-sensitive magnetic imaging of polycrystalline and epitaxial ultrathin cobalt films with a perpendicular magnetic anisotropy / Susanne Kuhrau ; Betreuer: Hans Peter Oepen." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2019. http://d-nb.info/1197801227/34.

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21

Jönsson, Petra. "Anisotropy, disorder and frustration in magnetic nanoparticle systems and spin glasses." Doctoral thesis, Uppsala University, Department of Materials Science, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-2038.

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<p>Magnetic properties of nanoparticle systems and spin glasses have been investigated theoretically, and experimentally by squid magnetometry.</p><p>Two model three-dimensional spin glasses have been studied: a long-range Ag(11 at% Mn) Heisenberg spin glass and a short-range Fe<sub>0.5</sub>Mn<sub>0.5</sub>TiO<sub>3</sub> Ising spin glass. Experimental protocols revealing ageing, memory and rejuvenation phenomena are used. Quantitative analyses of the glassy dynamics within the droplet model give evidences of significantly different exponents describing the nonequilibrium dynamics of the two

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22

Ferrante, Yari [Verfasser]. "Development of tetragonal Heusler compounds with perpendicular anisotropy for Magnetic Random Access Memory applications / Yari Ferrante." Halle, 2017. http://d-nb.info/114842511X/34.

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23

Venkataramana, Vikash. "Neutrons to probe nanoscale magnetism in perpendicular magnetic recording media." Thesis, University of St Andrews, 2012. http://hdl.handle.net/10023/3187.

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Анотація:

Magnetic recording media refers to the disc shaped thin film magnetic medium present inside the hard disk drive of a computer. Magnetic recording is an important function of the hard disk drive by which information such as text, pictures, audio and videos are stored. Information is broken down to a simple binary format and is stored as magnetised bits along the tracks of the disk forming the hard drive. Over the years advancements in research on the type of magnetic materials used has allowed increased data storage capacities by reducing magnetic bit sizes. It is with this advancement in magne

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24

Costa, Marcio. "First-principles Studies of Local Structure Effects in Magnetic Materials." Doctoral thesis, Uppsala universitet, Materialteori, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-179223.

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This thesis focus on the magnetic behavior, from single atoms to bulk materials. The materials considered in this thesis have been studied by computational methods based on ab initio theory, density functional theory (DFT), including treatment of the spin-orbit coupling, non-collinear magnetism, and methods capable of treating discorded systems. Furthermore strongly correlated materials have been investigated using the dynamical mean field theory (DMFT). The uniaxial magnetic anisotropy energy (MAE) of the Fe2P was investigated using the full-potential linear muffin tin orbital (FP-LMTO) metho

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25

Burkert, Till. "Materials for Magnetic Recording Applications." Doctoral thesis, Uppsala University, Department of Physics, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5800.

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<p>In the first part of this work, the influence of hydrogen on the structural and magnetic properties of Fe/V(001) superlattices was studied. The local structure of the vanadium-hydride layers was determined by extended x-ray absorption fine structure (EXAFS) measurements. The magnetic ordering in a weakly coupled Fe/V(001) superlattice was investigated using the magneto-optical Kerr effect (MOKE). The interlayer exchange coupling is weakened upon alloying with hydrogen and a phase with short-range magnetic order was observed.</p><p>The second part is concerned with first-principles calculati

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26

Wikberg, Magnus. "Fundamental Properties of Functional Magnetic Materials." Doctoral thesis, Uppsala universitet, Teknisk-naturvetenskapliga fakulteten, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-133257.

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Magnetic properties of powders, thin films and single crystals have been investigated using magnetometry methods. This thesis provides analysis and conclusions that are supported by the results obtained from spectroscopic and diffraction measurements as well as from theoretical calculations. First, the magnetic behavior of transition metal (TM) doped ZnO with respect to doping, growth conditions and post annealing has been studied. Our findings indicate that the magnetic behavior stems from small clusters or precipitates of the dopant, with ferromagnetic or antiferromagnetic interactions. At t

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27

Ball, David Klaus. "From 2D CoCrPt:SiO2 films with perpendicular magnetic anisotropy to 3D nanocones — A step towards bit patterned media —." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-113029.

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Анотація:

Due to the ever-increasing worldwide consumption of memory for digital information, new technologies for higher capacity and faster data storage systems have been the focus of research and development. A step towards achieving higher data storage densities or magnetic recording media is the concept of bit patterned media, where the magnetic recording layer is divided up into magnetically isolated bit units. This approach is one of the most promising technologies for increasing data storage densities and could be implemented by nanostructuring the wafer. Therefore, the fabrication of the approp

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28

Kimling, Judith [Verfasser], and Guido [Akademischer Betreuer] Meier. "Magnetization Reversal in Cylindrical Nanowires and in Nanowires with Perpendicular Magnetic Anisotropy / Judith Kimling. Betreuer: Guido Meier." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2013. http://d-nb.info/104275392X/34.

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29

Almasi, H., M. Xu, Y. Xu, T. Newhouse-Illige, and W. G. Wang. "Effect of Mo insertion layers on the magnetoresistance and perpendicular magnetic anisotropy in Ta/CoFeB/MgO junctions." AMER INST PHYSICS, 2016. http://hdl.handle.net/10150/621317.

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The effect of a thin Mo dusting layer inserted at the interface of Ta/CoFeB of perpendicular magnetic tunneling junction with MgO barriers was investigated. Unlike thick Mo layers that exhibited a strong (110) crystalline texture, the inserted Mo layer between Ta/CoFeB had little negative influence on the crystallization of CoFe (001), therefore combining the advantages of Mo as a good thermal barrier and Ta as a good boron sink. For optimized Mo dusting thickness, a large tunneling magnetoresistance of 208% was achieved in perpendicular magnetic tunneling junctions with superior thermal stabi

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30

Ball, David Klaus. "From 2D CoCrPt:SiO2 films with perpendicular magnetic anisotropy to 3D nanocones — A step towards bit patterned media —." Doctoral thesis, Helmholtz-Zentrum Dresden-Rossendorf, 2012. https://tud.qucosa.de/id/qucosa%3A26882.

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Анотація:

Due to the ever-increasing worldwide consumption of memory for digital information, new technologies for higher capacity and faster data storage systems have been the focus of research and development. A step towards achieving higher data storage densities or magnetic recording media is the concept of bit patterned media, where the magnetic recording layer is divided up into magnetically isolated bit units. This approach is one of the most promising technologies for increasing data storage densities and could be implemented by nanostructuring the wafer. Therefore, the fabrication of the approp

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31

Steinbach, Gabi, Michael Schreiber, Dennis Nissen, et al. "Field-responsive colloidal assemblies defined by magnetic anisotropy." American Physical Society, 2019. https://monarch.qucosa.de/id/qucosa%3A70641.

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Particle dispersions provide a promising tool for the engineering of functional materials that exploit self-assembly of complex structures. Dispersion made from magnetic colloidal particles is a great choice; they are biocompatible and remotely controllable among many other advantages. However, their dominating dipolar interaction typically limits structural complexity to linear arrangements. This paper shows how a magnetostatic equilibrium state with noncollinear arrangement of the magnetic moments, as reported for ferromagnetic Janus particles, enables the controlled self-organization of div

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32

Inglefield, Heather Elizabeth. "Misfit accomodation in thin films of Ni/Cu as measured by magnetic anisotropy." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/32659.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1995.<br>Includes bibliographical references (leaves 134-137).<br>by Heather Elizabeth Inglefield.<br>Ph.D.

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33

Vo, Van Chi. "Epitaxial graphene on metal for new magnetic manometric systems." Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00829379.

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Graphene is a candidate for next generation spintronics devices exploiting its long spin transport length and high carrier mobility. Besides, when put in interaction with a ferromagnet, it may become an active building block, as suggested by recent surface science studies revealing few tenth of a Bohr magneton magnetic moments held by carbon atoms in graphene on iron, and a Rashba spin-orbit splitting reaching about 10 meV in graphene on a high atomic number element such as gold. The extent to which graphene may influence the properties, e.g. magnetic ones, of the materials contacted to it was

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34

McClure, Adam Marc. "Epitaxial thin film deposition of magnetostrictive materials and its effect on magnetic anisotropy." Diss., Montana State University, 2012. http://etd.lib.montana.edu/etd/2012/mcclure/McClureA0512.pdf.

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Magnetostriction means that the dimensions of a material depend on its magnetization. The primary goal of this dissertation was to understand the effect of magnetostriction on the magnetic anisotropy of single crystal magnetostrictive thin films, where the epitaxial pinning of the material to a substrate could inhibit its conversion to new dimensions. In order to address this goal, several Fe-based binary alloys were deposited onto various substrates by molecular beam epitaxy. The samples were characterized by an array of techniques including electron diffraction, Rutherford backscattering, vi

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35

Richomme, Fabienne. "Etude expérimentale des propriétés structurales et magnétiques de multicouches fer/terbium : modulation de composition, anisotropie magnétique, effet d'irradiation aux ions." Rouen, 1996. http://www.theses.fr/1996ROUES008.

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Les multicouches Fe/Tb peuvent présenter une forte anisotropie magnétique perpendiculaire nécessaire à la réalisation d'un milieu d'enregistrement magnétique haute densité. Les multicouches étudiées ont été élaborées, soit par pulvérisation cathodique RF, soit par évaporation sous ultra-vide, puis caractérisées par spectrométrie Mössbauer par électrons de conversion, par diffraction de rayons X aux petits angles et grands angles et par mesures d'aimantation. Le grand nombre d'échantillons pulvérisés étudies a permis d'établir un diagramme précis des caractéristiques structurales et magnétiques

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36

Chapman, John Richard. "Ultrasonic wave interactions with magnetic colloids." Thesis, University of Nottingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366409.

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37

Le, Quang Tuan. "Magnetodynamics in Spin Valves and Magnetic Tunnel Junctions with Perpendicular and Tilted Anisotropies." Doctoral thesis, KTH, Materialfysik, MF, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-191176.

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Анотація:

Spin-torque transfer (STT) effects have brought spintronics ever closer to practical electronic applications, such as MRAM and active broadband microwave spin-torque oscillator (STO), and have emerged as an increasingly attractive field of research in spin dynamics. Utilizing materials with perpendicular magnetic anisotropy (PMA) in such applications offers several great advantages such as low-current, low-field operation combined with high thermal stability. The exchange coupling that a PMA thin film exerts on an adjacent in-plane magnetic anisotropy (IMA) layer can tilt the IMA magnetization

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38

Eggers, Tatiana M. "Surface and Interface Effects of Magnetoimpedance Materials at High Frequency." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7282.

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Amorphous and nanocrystalline transition metal magnetic alloys (TMMAs) have been the subjects of fundamental and applied study due to their unique structure. The lack of long-range order in these materials sets the stage for their soft magnetic properties to be tuned for a variety of technological applications, such as sensitive magnetic field sensors, high frequency transformers, and stress sensors. Fundamental investigation of the magnetic and structural properties of these materials is also motivated by their unique amorphous or nanocrystalline-embedded amorphous matrix morphology, which ha

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39

Lichter, Jenny 1982. "Iron-gallium alloys : temperature and field effects on [lambda]100 and magnetic anisotropy measurements." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/32728.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, June 2004.<br>"May 2004."<br>Includes bibliographical references (leaves 18-19).<br>Magnetostriction measurements were taken on samples of Fe-Ga alloys (Galfenol) containing between 18% and 35% Ga in fields of 5 kOe to 24 kOe from room temperature to liquid nitrogen temperature. In addition, room temperature magnetic anisotropy measurements were conducted on samples between 8% Ga and 25% Ga. No major hysteresis was found in any of the samples and the field dependence was found to be modest (-2%).

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Skuza, Jonathan Ronald. "Thin Film and Chemical Ordering Effects on the Magnetic Anisotropy in Binary Alloys." W&M ScholarWorks, 2011. https://scholarworks.wm.edu/etd/1539623583.

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This dissertation presents various investigations into the structure-property correlations in highly anisotropic FePt and FePd thin films and nanostructures. These binary alloy thin films may exhibit long-range chemical ordering (e.g. L10), which induces a strong uniaxial magnetic anisotropy whose orientation is dependent on the ordering direction in the thin film. The chemical ordering, and hence the magnetic anisotropy, in these thin films can be controlled and tailored through sputter deposition and ion implantation conditions followed by subsequent processing. Two novel fabrication method

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41

Steinke, Nina-Juliane. "Structure and magnetic properties of anisotropic ferromagnetic thin-film heterostructures." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609919.

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Bochi, Gabriel 1969. "Magnetic anisotropy in epitaxial Ni/Cu (001) thin films and Cu/Ni/Cu (001) sandwiches." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/11514.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1995.<br>Vita.<br>Includes bibliographical references (leaves 156-161).<br>by Gabriel Bochi.<br>Ph.D.

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Lee, Aidan Jarreau. "Engineering Magnetism in Rare Earth Garnet and Metallic Thin Film Heterostructures." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1589886138733333.

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Broddefalk, Arvid. "Magnetic properties of transition metal compounds and superlattices." Doctoral thesis, Uppsala University, Department of Materials Science, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-535.

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<p>Magnetic properties of selected compounds and superlattices have been experimentally studied using SQUID (superconducting quantum interference device) and VSM (vibrating sample magnetometer) magnetometry, neutron diffraction and Mössbauer spectroscopy measurements combined with theoretical <i>ab initio</i> calculations. </p><p>The magnetic compounds (Fe<sub>1-x</sub>M<sub>x</sub>)<sub>3</sub>P, M=Co or Mn have been studied extensively. It was found that Co can substitute Fe up to <i>x</i>=0.37. Increasing the Co content leads to a reduction of the Curie temperature and the magnetic moment p

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45

Akcaoglu, Fehmi Umit. "Investigating The Effect Of Deformation And Annealing Texture On Magnetic Anisotropy In Low-c Steel Sheets By Magnetic Barkhausen Noise Method." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615569/index.pdf.

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Deformation and annealing texture in the cold rolled low carbon steels is important for sheet metal forming operations and service performance. The aim of this study is to non-destructively investigate the effect of texture on magnetic anisotropy. Various samples having different textures and residual stress states, due to different % reduction in thickness, annealing and stress relieving treatment, were prepared. Texture maps were obtained by Magnetic Barkhausen noise measurements performed with 100 steps between the ranges of 00-3600 on the surface. Microstructure investigation by optical &a

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46

Yi, Jae-Young. "Microstructure and magnetic properties of Co-(CoO, CoNiO2̳, NiO) and Cox̳Ni1̳-̳x̳-CoO nanocomposite thin films /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2000. http://wwwlib.umi.com/cr/ucsd/fullcit?p3000403.

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47

Apaydin, Nil. "Novel Implementations of Coupled Microstrip Lines on Magnetic Substrates." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1373897365.

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Kyselov, Mykola. "Phenomenological theories of magnetic multilayers and related systems." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-63594.

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In this thesis multidomain states in magnetically ordered systems with competing long-range and short range interactions are under consideration. In particular, in antiferromagnetically coupled multilayers with perpendicular anisotropy unusual multidomain textures can be stabilized due to a close competition between long-range demagnetization fields and short-range interlayer exchange coupling. These spatially inhomogeneous magnetic textures of regular multidomain configurations and irregular networks of topological defects as well as complex magnetization reversal processes are described in t

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Ferraro, Filippo Jacopo. "Magnetic anisotropies and exchange bias in ultrathin cobalt layers for the tunnel anisotropic magnetoresistance." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAY086/document.

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Dans le cadre de l’étude des phénomènes magnétiques et de la spintronique qui sont présents aux échelles nanoscopiques nous avons étudié différents aspects des structures asymétriques de Pt/Co/AlOx. L’un des objectifs de cette thèse est le contrôle de l’oxydation et des propriétés magnétiques de ces multicouches. Nous avons combiné les mesures de structures (réflexion de Rayon-X), transports (Effet Hall anormal), et magnétiques (VSM-SQUID) afin de déterminer les rôles des effets magnétiques et d’interfaces. Un objectif était d’analyser le rôle de quelques monocouches (MCs) de CoO (qui peut se

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Tang, Minao. "SYNTHESES, STRUCTURES AND MAGNETIC CHARACTERIZATION OF DI- AND TRIVALENT HYDRIDOTRIS(3,5-DIMETHYLPYRAZOL-1-YL)BORATE CYANOMANGANATES." UKnowledge, 2008. http://uknowledge.uky.edu/gradschool_theses/546.

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The syntheses, structures, and magnetic properties of a series of di/trivalent hydridotris(3,5-dimethylpyrazol-1-yl)borate (Tp*) cyanomanganates were investigated. Treatment of manganese(III)acetylacetonate with KTp* followed by tetra(ethyl)- ammonium cyanide affords [NEt4][(Tp*)MnII(acac)(CN)] (1). Attempts to oxidize 1 with iodine affords {(Tp*)MnII(κ2O-acac-CN)}n (7); a minor complex {[NEt4][(Tp*)MnII(κ2O-acac-3-CN)]2(µ-CN) (8) was also isolated. The manganese(II) complex [NEt4][(Tp*)MnII(κ2O-acac-3-CN)(κ1N -3-NC-acac)] (2) was obtained via treatment of Mn(3-acacCN)3 with KTp* and [NEt4]CN.

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