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Dissertations / Theses on the topic 'Ferromagnetic Insulation'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 September 2023

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1

Tanaka, Clifford T. (Clifford Takashi). "Ferromagnet-insulator-ferromagnet tunneling with one half-metallic electrode." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/40602.

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2

Girgis, Emad Azmy Sultan. "Development of ferromagnetic, insulator, ferromagnetic devices for digital magnetic data storage and magnetic field sensors." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=960301429.

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3

Müller, Martina. "Electronic structure of ferromagnet insulator interfaces: Fe/MgO and Co/MgO." [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=985318716.

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4

Asano, Yasuhiro, Toshihiro Yoshida, Yukio Tanaka, and Alexander A. Golubov. "Electron transport in a ferromagnet-superconductor junction on graphene." American Physical Society, 2008. http://hdl.handle.net/2237/11295.

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5

Pinel, Lucas. "Probing the magnetic exchange interaction in agraphene-ferromagnetic insulator system usingQuantum Hall Effect and non-local resistancemeasurements." Thesis, KTH, Tillämpad fysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-162232.

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6

Ababsa, Mohamed Lamine. "Caractérisation de composants magnétiques et diélectriques pour les machines électriques tournantes très haute température High temperature magnetic characterization using an adapted Epstein frame High temperature characterization of electrical steels using an adapted Epstein frame." Thesis, Artois, 2018. http://www.theses.fr/2018ARTO0205.

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Dans ce travail de thèse, nous avons effectué des mesures de caractérisations magnétiques (cycles d’hystérésis, pertes, H_c…) à très haute température jusqu’à 600 °C, à l’aide d’un dispositif de caractérisation adapté à ces conditions extrêmes qui est un cadre Epstein que nous avons élaboré et réalisé. Sa validation a pu être vérifiée avec un cadre normalisé à température ambiante. Les mesures sont faites sur les deux types de tôles ferromagnétiques les plus utilisées : FeSi GO et NO. Les résultats montrent une réduction avec la température des pertes fer et des différents paramètres qui défin

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7

Pournia, Seyyedesadaf. "Exploring the Photoresponse and Optical Selection Rules in the Semiconductor Nanowires, Topological Quantum Materials and Ferromagnetic Semiconductor Nanoflakes using Polarized Photocurrent Spectroscopy." University of Cincinnati / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1627666632280473.

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8

Franson, Andrew J. "Patterning and Characterization of Ferrimagnets for Coherent Magnonics." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1595333967161284.

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9

Virot, François. "Etude théorique de matériaux pour la spintronique." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4816/document.

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Ce mémoire présente les travaux réalisés durant ces trois années de thèse. Ils se sont orientés autour de l'étude des propriétés électroniques et magnétiques des matériaux pour la spintronique. Ce domaine d'avenir doit encore trouver les matériaux adaptés qui permettraient de réaliser les concepts liés à la spintronique. Nos résultats sont les suivants. Nous avons proposé un nouveau modèle qui décrit l'arrangement magnétique dans les couches minces ferromagnétiques possédant une anisotropie uniaxiale. Le modèle apporte une meilleure description des largeurs de domaine en fonction de l'épaisseu

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10

PERRIN, GERALDINE. "Elaboration par pvd et caracterisation de couches minces ferromagnetiques sur film souple pour des applications hyperfrequence." Université Joseph Fourier (Grenoble), 1996. http://www.theses.fr/1996GRE10199.

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Ce travail concerne l'elaboration et l'etude de nouveaux materiaux magnetiques destines a des applications radiofrequences et hyperfrequences entre 1 mhz et 20 ghz. Jusqu'a present, les materiaux preferes dans les applications radiofrequences et hyperfrequences ont ete les ferrites. Il s'agit de materiaux isolants mais ferrimagnetiques donc a faible aimantation spontanee. Or les alliages ferromagnetiques ont des proprietes bien superieures aux ferrites en particulier des aimantations 3 a 4 fois superieures. Mais ce sont des conducteurs metalliques qui ne peuvent etre utilises sous forme massiv

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11

Jahjah, Walaa. "NanOstructures MultIferroïques INtrinsèques et extrinsèques : vers un contrôle Électrique des propriétés magnétiquEs (NOMINÉE) Influence of mesoporous or parasitic BiFeO3 structural state on the magnetization reversal in multiferroic BiFeO3/Ni81Fe19polycrystalline bilayers, in Journal of Applied Physics 124 (23), December 2018 Spin pumping as a generic probe for linear spin fluctuations: demonstration with ferromagnetic and antiferromagnetic orders, metallic and insulating electrical states, in Applied Physics Express 12(2), January 2019 Thickness dependence of magnetization reversal and magnetostriction in Fe81Ga19 thin films, in Physical Review Applied 12, August 2019." Thesis, Brest, 2019. http://www.theses.fr/2019BRES0070.

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Nous menons trois études expérimentales du comportement de renversement de l’aimantation (RM) dans trois types différents de bicouches, et sous différents types de contraintes. Nous étudions l’influence sur les propriétés magnétiques de l’état structural du BiFe03, de contraintes mécaniques magnétoélastiques dans le Fe81Ga19, couplées ensuite à des contraintes électriques et même thermiques.Une bicouche polycristalline composée d’un ferromagnétique Ni81Fe19, et d’un multiferroïque intrinsèque BiFe03, est déposée par pulvérisation cathodique. Sa structure et sa morphologie sont caractérisées pa

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12

KOUACOU, ABAKA MICHEL. "Apparition du ferromagnetisme itinerant dans des composes de type heusler. Relation avec des transitions isolant-metal." Université Joseph Fourier (Grenoble), 1996. http://www.theses.fr/1996GRE10087.

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L'etude des proprietes magnetiques et de transport de differentes series de solutions solides autour des alliages d'heusler tico#2sn et demi-heusler ticosn montre des caracteristiques classiques du ferromagnetisme itinerant. Dans la serie tico#2sn-tini#2sn, la densite locale est fortement reduite et le critere de stoner n'est plus maintenu pour tini#2sn. Le ferromagnetisme disparait au profit d'un etat paramagnetique de pauli. Vers la limite magnetique-non magnetique, la resistivite et la chaleur specifique montrent de fortes fluctuations de spin. Dans la serie tico#xsn avec 1<x<2, ou le cobal

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13

Jain, Himanshu. "An Investigation Of The Ferromagnetic Insulating State Of Manganites." Thesis, 2008. https://etd.iisc.ac.in/handle/2005/880.

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Electrical conductance in the ferromagnetic insulating (FMI) phase of manganites has been experimentally investigated. The investigations were performed on single crystals of compositions La0.82Ca0.18MnO3 and Nd0.7Pb0.3MnO3. The nature of electrical conductance is determined to be Shklovskii–Efros variable range hopping (SE–VRH). Further, at high bias levels, non–linear conductance (NLC) is observed. A “hot electron” model, that quantitatively explains the bias and temperature dependence of the NLC, consistent with the SE–VRH nature of electrical conductance, is presented. The limits of validi

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14

Jain, Himanshu. "An Investigation Of The Ferromagnetic Insulating State Of Manganites." Thesis, 2008. http://hdl.handle.net/2005/880.

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Electrical conductance in the ferromagnetic insulating (FMI) phase of manganites has been experimentally investigated. The investigations were performed on single crystals of compositions La0.82Ca0.18MnO3 and Nd0.7Pb0.3MnO3. The nature of electrical conductance is determined to be Shklovskii–Efros variable range hopping (SE–VRH). Further, at high bias levels, non–linear conductance (NLC) is observed. A “hot electron” model, that quantitatively explains the bias and temperature dependence of the NLC, consistent with the SE–VRH nature of electrical conductance, is presented. The limits of validi

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15

Liu, Yu Chi, and 劉有騏. "Spin-transfer-torque-induced ferromagnetic resonance in ferromagnet/topological insulator and yttrium iron garnet/Pt bilayer structures." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/yavwr2.

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博士<br>國立清華大學<br>物理系<br>105<br>Spin current and spin transfer torque play important roles in spintronics application. The spin current carries angular momentum, which can be transferred to the magnetization it passes through, a phenomenon known as spin-transfer torques. Generally, spin current can be generated by simply passing a charge current through a ferromagnetic metal (FM). A more efficient way to generate spin current is to utilize spin Hall effect (SHE) observed in the materials with strong spin orbital coupling (SOC) such as heavy metals (HM), which produce pure spin current transverse

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16

Girgis, Emad Azmy Sultan [Verfasser]. "Development of ferromagnetic, insulator, ferromagnetic devices for digital magnetic data storage and magnetic field sensors / by Emad Azmy Sultan Girgis." 2000. http://d-nb.info/960301429/34.

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17

"Numerical studies of a generalized double exchange model =: 廣義雙交換模型的數值硏究". 1999. http://library.cuhk.edu.hk/record=b5890053.

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Wong Chung Ki.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 1999.<br>Includes bibliographical references (leaves 93-94).<br>Text in English; abstracts in English and Chinese.<br>Wong Chung Ki.<br>Abstract --- p.i<br>Acknowledgement --- p.iii<br>Contents --- p.iv<br>List of Figures --- p.viii<br>List of Tables --- p.xii<br>Chapter Chapter 1. --- Introduction --- p.1<br>Chapter 1.1 --- Motivation --- p.1<br>Chapter 1.2 --- Double exchange model --- p.3<br>Chapter 1.3 --- This project --- p.5<br>Chapter Chapter 2. --- The generalized double exchange model --- p.6<br>Chapter 2.1

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18

Vadalá, Miriana [Verfasser]. "Structural and magnetic characterization of ferromagnet,insulator multilayers / vorgelegt von Miriana Vadalá." 2008. http://d-nb.info/990703355/34.

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19

Chiang, Hsin0Chun, and 江欣峻. "Metal-insulator Transition, Weak Ferromagnetism and d-wave Superconductivity in High-Tc Electron Superconductors." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/65088096122497301180.

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碩士<br>國立清華大學<br>物理學系<br>88<br>Metal-insulator transition in the Gd-doped (R1-yGdy)1.85Ce0.15CuO4-d systems occurred around y ~ 0.65 for R = Nd and y ~ 0.1 for R = Eu with a simultaneous structural transition from the tetragonal T￠-phase (space group I4/mmm) to an orthorhombic O￠-phase (Acam, ao ￡ bo ~O2 at). The structural change is due to the lattice mismatch between (R,Gd,Ce)2O2 layer and CuO2 layer which results with an oxygen distortion in the perfect square CuO2 plane. The phase diagram indicates that the superconductivity can only occur in the metallic T￠-phase cuprates where the metalli

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20

Müller, Martina [Verfasser]. "Electronic structure of ferromagnet insulator interfaces: Fe/MgO and Co/MgO / von Martina Müller." 2007. http://d-nb.info/985318716/34.

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21

Liu, Xiongjun. "Theory of the Anomalous Hall Effect in the Insulating Regime." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-10102.

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The Hall resistivity in ferromagnetic materials has an anomalous contribution proportional to the magnetization, which is defined as the anomalous Hall effect (AHE). Being a central topic in the study of ferromagnetic materials for many decades, the AHE was revived in recent years by generating many new understandings and phenomena, e.g. spin-Hall effect, topological insulators. The phase diagram of the AHE was shown recently to exhibit three distinct regions: a skew scattering region in the high conductivity regime, a scattering-independent normal metal regime, and an insulating regime. While

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22

Lin, Biing-Nan, and 林炳南. "A.The studies of physical properties and oxidation state of Pr and Cu for the insulating Pr1+xBa2-xCu3O7-y system; B. Ca1-xSrxRuO3 Itinerant Ferromagnetic System." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/01279052198550332343.

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博士<br>國立清華大學<br>物理學系<br>91<br>A.Pr1+xBa2-xCu3O7-y system The Pr L3-edge and Cu K-edge X-ray absorption near-edge strucutre (XANES) data and magnetic data for the insulating PrBa2Cu3O7-y (y = 0.05, 0.11, 0.21, 0.26, 0.57, 0.62, 0.79) and Pr1+xBa2-xCu3O7-y (x = 0.2, 0.4, 0.6, 0.8, 1.0) samples are reported. The anomalous antiferromagnetic Néel temperature TN decreases monotonically from 18.5 K for oxygenated compound (y = 0.05) to 11 K for oxygen-reduced compound (y = 0.79). The Pr L3-edge (2p-5d transition) XANES data indicate that the formal Pr valence decreases from 3.17 for y = 0.

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23

Sass, Björn. "Magnetische Grenzflächeneffekte in Doppellagen aus V2O3 und den ferromagnetisch geordneten Übergangsmetallen." Doctoral thesis, 2004. http://hdl.handle.net/11858/00-1735-0000-0006-B423-7.

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24

Pal, Somnath. "Investigation of Dielectric and Magnetic Properties of Some Selected Transition Metal Oxide Systems." Thesis, 2015. http://etd.iisc.ac.in/handle/2005/3878.

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High dielectric constant materials have tremendous impact on miniaturization of devices that are used in various applications like wireless communication systems, microelectronics, global positioning systems, etc. To store electric charge in a very small space necessarily needs a capacitor with very high dielectric constant. Thus, these materials are very important in fabricating capacitors, or metal oxide semiconductor filed effect transistor (MOSFET). Among the existing commercially available devices, silicon-based microelectronic devices are commonly used based on the moderately stable diel

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25

Pal, Somnath. "Investigation of Dielectric and Magnetic Properties of Some Selected Transition Metal Oxide Systems." Thesis, 2015. http://etd.iisc.ernet.in/2005/3878.

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High dielectric constant materials have tremendous impact on miniaturization of devices that are used in various applications like wireless communication systems, microelectronics, global positioning systems, etc. To store electric charge in a very small space necessarily needs a capacitor with very high dielectric constant. Thus, these materials are very important in fabricating capacitors, or metal oxide semiconductor filed effect transistor (MOSFET). Among the existing commercially available devices, silicon-based microelectronic devices are commonly used based on the moderately stable diel

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26

Choudhury, Aditya N. Roy. "Direct Measurement of Itinerant Magnetism & Interface States in Semiconductors using Time-varying Magnetic Fields." Thesis, 2016. http://etd.iisc.ac.in/handle/2005/2824.

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Magnetism in a solid | dia, para, ferro, or of other forms | originates majorly from its electrons; one could, infact, ignore the nuclear contribution. There are two types of electrons in a solid: bound, and free (also called itinerant). It is interesting to note that although several experimental techniques exist that measure the total magnetization/ susceptibility of a solid, no experiment directly probes the individual magnetic contributions from the bound and the itinerant electrons. In the past couple of decades, owing to the advent of sophisticated fabrication facilities, certain man-ma

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27

Choudhury, Aditya N. Roy. "Direct Measurement of Itinerant Magnetism & Interface States in Semiconductors using Time-varying Magnetic Fields." Thesis, 2016. http://etd.iisc.ernet.in/handle/2005/2824.

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Magnetism in a solid | dia, para, ferro, or of other forms | originates majorly from its electrons; one could, infact, ignore the nuclear contribution. There are two types of electrons in a solid: bound, and free (also called itinerant). It is interesting to note that although several experimental techniques exist that measure the total magnetization/ susceptibility of a solid, no experiment directly probes the individual magnetic contributions from the bound and the itinerant electrons. In the past couple of decades, owing to the advent of sophisticated fabrication facilities, certain man-ma

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