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Dissertations / Theses on the topic 'Magnetic charge'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Spencer, Philip David. "Charge and magnetic X-ray scattering." Thesis, Durham University, 2004. http://etheses.dur.ac.uk/2994/.

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The hole doped transition metal oxides show remarkable properties that are related to the influence of charge and spin correlations. In this thesis charge correlations in hole doped manganite and nickelate systems are smdied using soft (˂2 keV), normal (10 keV) and high energy x-ray scattering (100 keV).The charge and J aim-Teller (JT) order is studied in the bi-layer manganite La(_2)-(_2r) Sr(_1)+(_2x)Mn(_2)O(_7) for x = 0.5, 0.55 and 0.60 using high energy x-ray scattering. In the x = 0.55 sample the charge ordered state existed in the same checkerboard pattern as observed in the x = 0.5 sam

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2

Wright, Samuel James. "Quantised charge pumping in a perpendicular magnetic field." Thesis, University of Cambridge, 2010. https://www.repository.cam.ac.uk/handle/1810/265507.

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There are seven base units in the International System of Units; the metre, kilogram, second, kelvin, ampere, mole and candela. Quantum metrology aims to redefine these quantities in terms of fundamental constants of nature such as the Planck, A vogadro and Boltzmann constants. In the electrical domain, the quantum Hall effect and Josephson effect provide quantum standards for resistance and voltage, respectively. Combining them through Ampere's law yields an indirect quantum standard for current. However, a quantum metrological redefinition of the ampere requires a stand-alone source of curre

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3

Tolley, Robert Douglas. "Charge Transport in Nano-Constrictions and Magnetic Microstructures." Miami University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=miami1344095174.

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4

Ghosh, Sadhan. "Charge induced tunable magnetic properties in transition metal alloys." Karlsruhe : Forschungszentrum Karlsruhe, 2008. http://d-nb.info/989599701/34.

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5

Senn, Mark Stephen. "Charge, orbital and magnetic ordering in transition metal oxides." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/7828.

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Neutron and x-ray diffraction has been used to study charge, orbital and magnetic ordering in some transition metal oxides. The long standing controversy regarding the nature of the ground state (Verwey structure) of the canonical charge ordered material magnetite (Fe3O4) has been resolved by x-ray single crystal diffraction studies on an almost single domain sample at 90 K. The Verwey structure is confirmed to have Cc symmetry with 56 unique sites in the asymmetric unit. Charge ordering is shown to be a useful first approximation to describe the nature of the ground state, and the conjecture

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6

Martin, Lee. "Structures and properties of magnetic molecular charge transfer salts." Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300630.

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7

Usmani, Suhail. "Charge transport in the assemblies of magnetic, non-magnetic and spin-cross over nano-structures." Thesis, Toulouse, INSA, 2018. http://www.theses.fr/2018ISAT0012.

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La compréhension des propriétés de transport de charge des nanostructures métalliques et magnétiques est très importante pour le développement et la miniaturisation des dispositifs fonctionnels modernes. En particulier, les nanostructures synthétisées chimiquement sont intéressant car elles permettent de mieux contrôler leur forme et leur taille, ce qui peut être utilisé pour ajuster leurs propriétés de transport de charge. L'objectif de cette thèse est d'étudier les aspects différents des propriétés de transport de charge qui résultent de la petite taille et de la nature magnétique de différe

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8

Simons, Benjamin David. "Charge carriers in magnetic Mott insulators : a route to superconductivity." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358784.

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9

Human, Trevor. "Landauer's theory of charge and spin transport in magnetic multilayers." Thesis, City University London, 2014. http://openaccess.city.ac.uk/3415/.

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The nonequilibrium Keldysh formalism has been used to study the spin transport effects found in magnetic multi-layered nanostructures. We formulate a new methodology based on Landauer and show it to be in very good qualitative agreement with Keldysh. However, our theory provides more information regarding the physics of these effects because it allows us to calculate the contributions of individual electrons incident from either side of a junction as well as the contributions within a single layer that are incident on and reflected from an adjacent interface. Chapter 1 provides a consolidated

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10

Martin, Jesse. "Magnetic Field Dependent Charge Transport Studies in Organic Semiconducting Marterials." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1292530511.

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11

Majewski, Pawel W. "Magnetic Alignment and Charge Transport Improvement in Functional Soft Materials." Thesis, Yale University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3578414.

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<p> The realization of nanostructured functional materials by self-assembly in polymers and polymer nanocomposites is adversely affected by persisting structural defects which greatly diminish the performance of the material. The use of magnetic fields to impose long-range order is investigated in three distinct systems - ion-conducting block copolymers, semiconducting nanowire-polymer composites and lyotropic surfactant mesophases. The alignment process is quantitatively studied with X-ray scattering and microscopic methods. Time and temperature resolved data collected <i>in situ</i> during t

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12

Meier, Daniel [Verfasser]. "Thermally generated spin and charge transport in magnetic materials / Daniel Meier." Bielefeld : Universitätsbibliothek Bielefeld, 2015. http://d-nb.info/1077063474/34.

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13

Ghosh, Sadhan [Verfasser]. "Charge induced tunable magnetic properties in transition metal alloys / Sadhan Ghosh." Karlsruhe : Forschungszentrum Karlsruhe, 2008. http://d-nb.info/989599701/34.

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14

Ulbrich, Holger [Verfasser]. "Interplay between charge, orbital, and magnetic ordering in manganites / Holger Ulbrich." München : Verlag Dr. Hut, 2012. http://d-nb.info/1025821564/34.

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15

Coomber, Andrew Treeve. "Magnetic and electrical properties of low dimensional molecular solids." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387616.

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16

Freeman, Paul Gregory. "Magnetism and the magnetic excitations of charge ordered La_(â‚‚_-_x_)Sr_(_x_)NiO_(â‚„â‚Š_Î´_)." Thesis, University of Oxford, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.418806.

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17

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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18

Rodde, Roland [Verfasser]. "Elemental and charge-state composition inside magnetic clouds determined with ACE-SWICS / Roland Rodde." Kiel : Universitätsbibliothek Kiel, 2009. http://d-nb.info/1019867620/34.

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19

Möser, Jannik [Verfasser]. "Charge transport in amorphous silicon : a study by electrically detected magnetic resonance / Jannik Möser." Berlin : Freie Universität Berlin, 2019. http://d-nb.info/1187734713/34.

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20

Matharu, Satpal. "Charge dynamics in coupled semiconductor superlattices." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/17158.

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In this thesis, we investigate the collective electron dynamics in single and coupled superlattice systems under the influence of a DC electric field. Firstly, we illustrate that Bloch oscillations suppress electron transport and the resulting charge domains form self-sustained current oscillations. Upon the application of a tilted magnetic field, stochastic web structures are shown to form in the phase space of the electron trajectory. This occurs only when the Bloch and cyclotron frequencies are commensurate allowing the electrons to demonstrate chaotic unbounded trajectories, leading to an

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21

Sen, M. "Study of magnetic, electric and thermal properties in Fe3Se4 system: Interplay of spin, charge and phonon." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2017. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/5870.

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22

Mohamed, Zakiah. "Relationships Among Structure, Magnetism and State of Charge in Positive Electrode Materials for Metal-Ion Batteries." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/14438.

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Polyanionic framework materials containing 3d transition metals such as iron, cobalt and manganese are attractive candidates as electrodes in lithium and sodium ion batteries due to their thermal stability, long cycle life and environmental friendliness. LiFePO4 is already used in some commercial lithium ion batteries as a positive electrode material where these are key attributes, but it still has lower energy density and higher costs compared to the more commonly used LiCoO2. This thesis describes a combined physical properties and magnetic structures some of these materials, aimed at improv

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23

Mansuripur, M. "Comment on Jackson's analysis of electric charge quantization due to interaction with Dirac's magnetic monopole." ELSEVIER SCIENCE BV, 2016. http://hdl.handle.net/10150/622958.

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In J.D. Jackson's Classical Electrodynamics textbook, the analysis of Dirac's charge quantization condition in the presence of a magnetic monopole has a mathematical omission and an all-too-brief physical argument that might mislead some students. This paper presents a detailed derivation of Jackson's main result, explains the significance of the missing term, and highlights the close connection between Jackson's findings and Dirac's original argument. (C) 2016 Sharif University of Technology. All rights reserved.

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24

Mishra, Snigdharaj K. "Mean-field and density-functional studies of charge ordering and magnetic transitions in lanthanum manganites /." free to MU campus, to others for purchase, 1997. http://wwwlib.umi.com/cr/mo/fullcit?p9841176.

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25

Berger, Andrew Joseph. "Studying Spin and Charge Coupling in Operational Spintronic Devices Using Multi-Mode Magnetotransport Scanning Probe Microscopy and Ferromagnetic Resonance." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429702400.

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26

Mozafari, Elham. "Theoretical Description of the Electron-Lattice Interaction in Molecular and Magnetic Crystals." Doctoral thesis, Linköpings universitet, Teoretisk Fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-130517.

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Electron-lattice interactions are often considered not to play a major role in material's properties as they are assumed to be small, the second-order effects. However, this study shows the importance of taking these effects into account in the simulations. My results demonstrate the impact of the electron-lattice interaction on the physics of the material and our understanding from it. One way to study these effects is to add them as perturbations to the unperturbed Hamiltonians in numerical simulations. The main objective of this thesis is to study electron-lattice interactions in molecular

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27

Michel, Christoph. "Theoretical studies of spin dependent transport phenomena [transport in magnetic semiconductors ; spin dependent charge carrier recombination]." Göttingen Cuvillier, 2007.

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28

Shulman, Julian. "A search for particles with magnetic charge produced in e⁺e⁻ annihilations at √s=35 GeV." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47257.

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29

Carter, Austin Roberts. "Magnetic field effects and self-assembled n-type nanostructures to increase charge collection in organic photovoltaics." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1324960593.

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30

Porter, Christopher Douglas. "Topics in the Theory of Josephson Arrays and Disordered Magnetic Systems." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1315459079.

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31

Aizawa, Hirohito, Kazuhiko Kuroki, and Yukio Tanaka. "Strong magnetic field enhancement of spin triplet pairing arising from coexisting 2k_F spin and 2k_F charge fluctuations." American Physical Society, 2008. http://hdl.handle.net/2237/11284.

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32

Wei, Haoming, Jose Luis Barzola-Quiquia, Chang Yang, et al. "Charge transfer-induced magnetic exchange bias and electron localization in (111)- and (001)-oriented LaNiO3/LaMnO3 superlattices." American Institute of Physics, 2017. https://ul.qucosa.de/id/qucosa%3A23554.

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High-quality lattice-matched LaNiO3/LaMnO3 superlattices with monolayer terrace structure have been grown on both (111)- and (001)-oriented SrTiO3 substrates by pulsed laser deposition. In contrast to the previously reported experiments, a magnetic exchange bias is observed that reproducibly occurs in both (111)- and (001)-oriented superlattices with the thin single layers of 5 and 7 unit cells, respectively. The exchange bias is theoretically explained by charge transfer-induced magnetic moments at Ni atoms. Furthermore, magnetization data at low temperature suggest two magnetic phases in the

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33

Claypool, Ian Randolph. "A theoretical and numerical study of the use of grid embedded axial magnetic fields to reduce charge exchange ion induced grid erosion in electrostatic ion thrusters." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1172690635.

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34

Liu, William K. "Electron spin dynamics in quantum dots, and the roles of charge transfer excited states in diluted magnetic semiconductors /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/8588.

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35

Forino, Paola Caterina. "Nuclear magnetic resonance study of the electron doped Dirac-Mott Insulator double perovskite Ba2Na(1-x)CaxOsO6." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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Osmium-based materials exhibit unconventional magnetism due to the interplay between spin orbit coupling and strong electronic correlations. In this thesis we investigate for the first time the effect of charge doping on the Dirac Mott insulator double perovskites Ba2Na(1-x)CaxOsO6 by using Nuclear Magnetic Resonance technique. We study in details the evolution of the magnetic phase diagram as a function of doping and applied magnetic field. The system rapidly evolves from a canted to a collinear antiferromagnetic ground state with a monotonic increase of the magnetic transition temperature

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36

Le, Poul Nicolas. "Charge transfer at the high-temperature superconductor/liquid electrolyte interface." Thesis, University of Exeter, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391279.

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37

Almeida, António José Sousa de. "Magnetic resonance studies of spin systems in semiconductor nanocrystals." Doctoral thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/18636.

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Doutoramento em Física<br>Esta tese apresenta um estudo experimental de sistemas de spins fornecidos por dopantes electrónicos e por defeitos capturadores de carga em nanocristais (NCs) semiconductores, por meio de técnicas de ressonância magnética. Aqui, investigámos problemas que têm efeitos limitadores de performance nas propriedades de NCs semiconductores para o seu uso em aplicações tecnológicas. Nomeadamente, estudámos a dopagem electrónica de NCs semiconductores. A dopagem é crítica para controlar o comportamento de semiconductores, que de outra forma seriam isoladores. Investigá

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38

Correa, Jose Ricardo. "Studies of Charged Particle Dynamics for Antihydrogen Synthesis." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc699934/.

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Synthesis and capture of antihydrogen in controlled laboratory conditions will enable precise studies of neutral antimatter. The work presented deals with some of the physics pertinent to manipulating charged antiparticles in order to create neutral antimatter, and may be applicable to other scenarios of plasma confinement and charged particle interaction. The topics covered include the electrostatic confinement of a reflecting ion beam and the transverse confinement of an ion beam in a purely electrostatic configuration; the charge sign effect on the Coulomb logarithm for a two component (e.g

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39

Tyree, William Stuart. "Correlation of Structure and Magnetic Properties in Charge-Transfer Salt Molecular Magnets Composed of Decamethylmetallocene Electron Donors and Organic Electron Acceptors." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/34436.

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Di-n-propyl dicyanofumarate (DnPrDCF) and di-isopropyl dicyanofumarate (DiPrDCF) have been used as one-electron acceptors in the synthesis of charge-transfer salt magnets with decamethylmetallocenes, MCp*2 (M = Mn, Cr). Salts of each acceptor with each metallocene have been characterized and the structures of the chromium analogues have been solved. The two acceptors are structurally similar to dimethyl dicyanofumarate (DMeDCF) and diethyl dicyanofumarate (DEtDCF), which have been previously studied and found to form charge-transfer salt magnets with the aforementioned decamethylmetallocenes

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40

Weber, Frank. "Probing electronic phase transitions with phonons via inelastic neutron scattering : superconductivity in borocarbides, charge and magnetic order in manganites$nElektronische Ressource /." [S.l. : s.n.], 2007. http://digbib.ubka.uni-karlsruhe.de/volltexte/1000007516.

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41

Барсегян, Н. М. "Використання методу зарядової щільності для обчислення аксіально-симетричного неоднорідного магнітного поля". Thesis, Сумський державний університет, 2016. http://essuir.sumdu.edu.ua/handle/123456789/45843.

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Дана робота присвячена реалізації алгоритму розрахунку аксіально-симетричного неоднорідного магнітного поля на базі методу зарядової щільності (МЗЩ), котрий призначений для задач електростатики. Не зважаючи на ряд обмежень, різні автори, наприклад, допускають можливість введення «магнітних зарядів» та «магнітних потенціалів» в МЗЩ для подальшого розрахунку напруженості статичних магнітних полів. У роботі були вивчені відомі обмеження використання МЗЩ, розроблено чисельний алгоритм для моделювання конкретної магнітооптичної системи, що використовується лабораторному генераторі дифракційного вип

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42

Пономарева, А. А., Ivan Volodymyrovych Barsuk, Иван Владимирович Барсук та Іван Володимирович Барсук. "Вычисление магнитных полей методом зарядовой плотности". Thesis, Видавництво СумДУ, 2010. http://essuir.sumdu.edu.ua/handle/123456789/4180.

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43

Kitaura, R., H. Okimoto, H. Shinohara, T. Nakamura, and H. Osawa. "Magnetism of the endohedral metallofullerenes M@C_82 (M=Gd,Dy) and the corresponding nanoscale peapods: Synchrotron soft x-ray magnetic circular dichroism and density-functional theory calculations." American Physical Society, 2007. http://hdl.handle.net/2237/11305.

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44

Scharf, Benedikt [Verfasser], and Jaroslav [Akademischer Betreuer] Fabian. "Spectral and magnetic properties of two-dimensional Dirac systems and thermal spin-charge coupling in electronic systems / Benedikt Scharf. Betreuer: Jaroslav Fabian." Regensburg : Universitätsbibliothek Regensburg, 2012. http://d-nb.info/1027410219/34.

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45

Conrad, Joël. "Modélisation d'un transformateur de courant à charge variable." Grenoble INPG, 1997. http://www.theses.fr/1997INPG0171.

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Les transformateurs de courant débitent généralement dans une charge de faible impédance. Si cette condition n'est pas remplie, l'induction dans le tore et le courant magnétisant ne sont plus négligeables. Ce mémoire traite ce cas de figure avec en plus des courants éventuellement non sinusordaux et avec une composante contin!le. Un modèle analytique s'étoffe au fur et à mesure afin de tenir compte de ces spécificités. - D'abord nous analysons le comportement de la chaîne de mesure avec des courants sinusoidaux, nous développons un modèle analytique non linéaire de l'impédance magnétisante et

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46

Keika, Kunihiro. "Outflow and charge-exchange losses of the ring-current ions during magnetic storms : estimate based on measurement of energetic ions and neutral atoms." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/144192.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(理学)<br>甲第12109号<br>理博第3003号<br>新制||理||1448(附属図書館)<br>23945<br>UT51-2006-J104<br>京都大学大学院理学研究科地球惑星科学専攻<br>(主査)教授町田忍, 教授家森俊彦, 教授淡路敏之<br>学位規則第4条第1項該当

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47

Bamler, Robert Verfasser], Achim [Gutachter] Rosch, and Alexander [Gutachter] [Altland. "Phase-Space Berry Phases in Chiral Magnets: Skyrmion Charge, Hall Effect, and Dynamics of Magnetic Skyrmions / Robert Bamler. Gutachter: Achim Rosch ; Alexander Altland." Köln : Universitäts- und Stadtbibliothek Köln, 2016. http://d-nb.info/1113178728/34.

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48

Raimbault, Nathaniel. "Gauge-invariant magnetic properties from the current." Thesis, Toulouse 3, 2015. http://www.theses.fr/2015TOU30179/document.

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De nombreux phénomènes physiques ne peuvent être compris qu'en s'intéressant à la structure électronique. Cette dernière peut être interprétée en termes de propriétés électromagnétiques, chacune de ces propriétés révélant diverses informations sur le système étudié. Il est donc important d'avoir des outils efficaces afin de calculer de telles propriétés. C'est dans ce contexte que cette thèse a été écrite, notre principal objectif ayant été de développer une méthode générale donnant accès à une vaste gamme de propriétés électromagnétiques. Dans la première partie de cette thèse, nous décrivons

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49

Butaud, Patrick. "Etude par résonance magnétique nucléaire des ondes de densité de charge dans les conducteurs quasi-unidimensionnels inorganiques." Grenoble 1, 1987. http://www.theses.fr/1987GRE10018.

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Etude plus particuliere du bronze bleu de rubidium rb::(0,3)moo::(3). Analyse du profil de raie spectrale, de relaxation magnetique en presence d'une onde de densite de charge statique, puis dynamique. Mise en evidence d'effets pretransitionnels tant statiques que dynamiques. Observation d'une mise en ordre de defauts charges par l'onde de densite de charge. L'etude met en evidence l'absence de zones commensurables bien definies a basse temperature malgre un changement dans la dynamique du systeme. Observation directe par rmn du mouvement d'une onde de densite de charge responsable du transpor

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50

Cabuil, Valérie. "Ferrofluides a base de maghemite : synthese, proprietes physicochimiques et magneto-optiques." Paris 6, 1987. http://www.theses.fr/1987PA066001.

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Les ferrofluides etudies sont constitues de particules de maghemite solubilisees en milieu aqueux (ferrofluides ioniques) ou non aqueux (ferrofluides surfactes). Le mode de synthese permet de controler les caracteristiques des grains (taille et densite superficielle de charge)

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