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Dissertations / Theses on the topic 'Spin currents'

Author: Grafiati
Published: 6 September 2023
Last updated: 8 June 2024

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1

Wittmann, Angela Dorothea Anshi. "Spin currents in organic semiconductors." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/290148.

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Organic semiconductors have recently been found to have a comparably large spin diffusion time and length. This makes them ideal candidates for spintronic devices. However, spin injection, transport and detection properties in organic materials have yet to be fully understood. This work studies spin injection from ferromagnets into organic semiconductors via spin pumping. Furthermore, work towards thermal spin injection, and detection is presented and discussed. The first part of this thesis comprises the spin pumping experiments. Measuring linewidth broadening of the microwave absorption at f
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2

Díaz, Santiago Sebastián Alejandro. "Controlling Spin Interactions With Electric Currents." Tesis, Universidad de Chile, 2010. http://www.repositorio.uchile.cl/handle/2250/102410.

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3

Wulfhorst, Jeannette [Verfasser]. "Nonlocal spin currents in mesoscopic metallic spin valves / Jeannette Wulfhorst." München : Verlag Dr. Hut, 2012. http://d-nb.info/1028783183/34.

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4

Hahn, Christian. "Magnetization dynamics and pure spin currents in YIG/normal-metal systems." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066657.

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Le domaine de recherche de la spintronique vise a concevoir des dispositifs électroniques misant sur le degré de libre de spin pour transporter de l'information. An d'intégrer ces courants de spin dans des dispositifs électroniques, il est particulièrement intéressant d'étudier l'inter-conversion d'un pur courant de spin en un courant de charge par l'effet Hall de spin, ainsi que le transfert de moment angulaire entre les électrons de conduction d'un métal normal (NM) et l'aimantation d'un ferromagnétique (FM) (couple de transfert de spin / pompage de spin). An de mieux comprendre ces différen
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5

Savero, Torres Williams. "Interplay between pure spin currents and magnetic domain walls." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENY084.

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Ce manuscrit est basé sur l'étude de l'interaction entre des purs courants de spin et parois de domaines magnétiques. Cet étude a été divisée en quatre parties. Dans la première partie, nous avons donné une explication détaillée du transport de spin dans des nano structure métalliques en utilisant trois approches différentes. La deuxième partie est focalisée sur l'utilisation d'un pur courant de spin pour induire le mouvement d'un paroi de domaine. Dans la troisième et quatrième partie nous avons mis en évidence deux nouvelle techniques d'injection et détection de spin en utilisant des parois
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6

Zhang, S., and A. Fert. "Conversion between spin and charge currents with topological insulators." AMER PHYSICAL SOC, 2016. http://hdl.handle.net/10150/622358.

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Injection of a spin current into the surface or interface states of a topological insulator (TI) induces a charge current (inverse Edelstein effect or IEE) and, inversely, a charge current flowing at the surface or interface states of a TI generates a nonzero spin density (Edelstein Effect or EE) from which a spin current can be ejected into an adjacent layer. The parameters characterizing the efficiency of these conversions between spin and charge currents have been derived in recent experiments. By using a spinor distribution function for a momentum-spin locked TI, we determine a number of s
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7

Stagraczyński, Stefan Piotr [Verfasser]. "Magnetic dynamics and spin currents in quantum spin systems strongly coupled to environment / Stefan Piotr Stagraczyński." Halle, 2017. http://d-nb.info/114951289X/34.

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8

Statuto, Nahuel. "Magnetic Excitations Induced by Surface Acoustic Waves and Spin-Polarized Currents." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/667710.

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The goal of this thesis is to explore and control the magnetization dynamics on magnetic multilayered thin films through two different techniques: the application of strain and spin- polarized currents, which represent lower-power consumption approaches to the control of magnetization dynamics compared with conventional techniques. The ferromagnetic materials with nanometric thickness used in this thesis are magnetic materials widely used in research. Aside the purely scientific interest, these materials are potentially applicable in telecommunications or technologies for storing and transm
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9

Fransson, Jonas. "Non-Orthogonality and Electron Correlations in Nanotransport : Spin- and Time-Dependent Currents." Doctoral thesis, Uppsala University, Department of Physics, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-2687.

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<p>The concept of the transfer Hamiltonian formalism has been reconsidered and generalized to include the non-orthogonality between the electron states in an interacting region, e.g. quantum dot (QD), and the states in the conduction bands in the attached contacts. The electron correlations in the QD are described by means of a diagram technique for Hubbard operator Green functions for non-equilibrium states. </p><p>It is shown that the non-orthogonality between the electrons states in the contacts and the QD is reflected in the anti-commutation relations for the field operat
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10

Caruso, Laure. "Giant magnetoresistance based sensors for local magnetic detection of neuronal currents." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066272/document.

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L'étude de l'activité cérébrale nécessite des enregistrements simultanés à différentes échelles spatiales, d'une cellule unique aux aires corticales du cerveau. Ces mesures fournissent un aperçu sur la relation entre les structures, les fonctions et la dynamique des circuits neuronaux. Les techniques d'électrophysiologie apportent des informations cruciales sur l'activité électrique dans les neurones. Sonder localement la signature magnétique de cette activité donne des informations directes sur les courants neuronaux et la nature vectorielle d'une mesure magnétique renseigne sur la directionn
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11

Olbrich, Peter [Verfasser]. "THz radiation induced spin polarized currents in low dimensional semiconductor structures / Peter Olbrich." Regensburg : Univ.-Verl. Regensburg, 2010. http://d-nb.info/1007748214/34.

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12

Severac, Childerick Henri Louis. "Spin injection into high temperature superconductor." Thesis, University of Birmingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369295.

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13

Cramer, Joel [Verfasser]. "Propagation, manipulation and detection of magnonic spin currents in magnetic oxides and metals / Joel Cramer." Mainz : Universitätsbibliothek Mainz, 2018. http://d-nb.info/1173005986/34.

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14

Terrade, Damien [Verfasser], and Walter [Akademischer Betreuer] Metzner. "Proximity effects and Josephson currents in ferromagnet : spin-triplet superconductors junctions / Damien Terrade. Betreuer: Walter Metzner." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2015. http://d-nb.info/1071843494/34.

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15

Czeschka, Franz Dominik [Verfasser], Rudolf [Akademischer Betreuer] Gross, and Martin S. [Akademischer Betreuer] Brandt. "Spin Currents in Metallic Nanostructures / Franz Dominik Czeschka. Gutachter: Rudolf Gross ; Martin S. Brandt. Betreuer: Rudolf Gross." München : Universitätsbibliothek der TU München, 2011. http://d-nb.info/1015627935/34.

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16

Loren, Eric Justin. "All optical injection and detection of ballistic charge and spin currents in gallium arsinide, germanium, and silicon." Diss., University of Iowa, 2011. https://ir.uiowa.edu/etd/2742.

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Charge transport and spin transport (spintronics) over nanometer spatial scales are topics of fundamental scientific and technological interest. If the potential of nano-devices and spintronics is to be realized, ways must be developed to inject and control ballistic charge and spin currents, as well as to measure their motion. Here, using novel polarization and phase sensitive optical pump probe techniques, we not only inject ballistic charge and spin currents in GaAs, Ge, and Si but also follow the subsequent carrier motion with < 1 nm spatial and 200 fs temporal resolution. Unlike most free
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17

Stanley, Daniel C. "MAGNETIC DAMPING IN FE3O4 THROUGH THE VERWEY TRANSITION FOR VARIABLE AG THICKNESSES." Miami University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=miami1376500586.

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18

Schlitz, Richard [Verfasser], Sebastian T. B. [Gutachter] Goennenwein, and Felix [Gutachter] Casanova. "Topological Transport Effects and Pure Spin Currents in Nanostructures / Richard Schlitz ; Gutachter: Sebastian T. B. Goennenwein, Felix Casanova." Dresden : Technische Universität Dresden, 2020. http://d-nb.info/1227201397/34.

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19

Saygun, Turab. "Magnetic State Detection in Magnetic Molecules Using Electrical Currents." Thesis, Uppsala universitet, Materialteori, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-257094.

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A system with two magnetic molecules embedded in a junction between non-magnetic leads was studied. In this system electrons tunnel from the localized energy level in region one to the localized energy level in region two generating a flow of electric charge through the quantum dot system. The current density and thus the conductance changes depending on the molecular spin moment. In this work we studied molecules with either spin "up" or spin "down" and with symmetric coupling strengths. The results indicate that the coupling strength between energy level and molecule together with the tunnel
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20

Remy, Quentin. "Ultrafast spin dynamics and transport in magnetic metallic heterostructures." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0191.

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Le contrôle de l'aimantation, et donc du spin, aux échelles de temps ultra courtes, est un sujet d'importance fondamentale pour l'élaboration de systèmes qui peuvent stocker de l'information beaucoup plus rapidement. La possibilité d'écrire de l'information avec des pulses laser femtoseconde sur des métaux magnétiques tels que GdFeCo ou MnRuGa en quelques picosecondes fut une étape conséquente pour pouvoir réaliser ce progrès technologique. Cependant, le renversement de l'aimantation observé dans ces matériaux après les avoir irradié avec un unique pulse laser, appelé retournement tout optique
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21

Souza, Marcos Vinicios de. "Estudo da reorientação de spin nos compostos RX2 (R = terra rara; X: Al, Ni)." Pós-Graduação em Física, 2013. https://ri.ufs.br/handle/riufs/5290.

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In this work, our initial efforts have been directed to study the behavior of the magnetization as a function of temperature, calculated according to the approximate method of the anisotropy constants and the resolution of a Hamiltonian (that includes the crystal field) as exemplified for the DyAl2 compound. Furthermore, we investigated the magneto-thermal characteristics of some members of the RX2 series (R: rare earth, X: Al, Ni), including spin reorientation (SR), by using a model Hamiltonian, that consists of localized magnetic moments interacting via exchange and crystal field interaction
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22

Hau, Wing Yu. "Electrical current converted from optically excited spin current /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?PHYS%202008%20HAU.

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23

Денисов, Станіслав Іванович, Станислав Иванович Денисов, Stanislav Ivanovych Denysov, and V. V. Shchotkin. "Influence of Spin-polarized Current on Spin Waves in Ferromagnets." Thesis, Sumy State University, 2018. http://essuir.sumdu.edu.ua/handle/123456789/67944.

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It has been recently established that spin-polarized current can have a direct influence on the magnetization dynamics in conducting ferromagnets. This effect has quantum origin and is of great interest from both fundamental and applied viewpoints. In particular, it can be useful for developing magnetoresistance random access memory, magnetic logic elements and microwave devices, to name a few.
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24

He, Jiexuan. "Effects of spin current in ferromagnets." Diss., Columbia, Mo. : University of Missouri-Columbia, 2008. http://hdl.handle.net/10355/6060.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2008.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on August 4, 2009) Vita. Includes bibliographical references.
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25

Ivanov, V. I., V. K. Dugaev, E. Y. Sherman, and J. Barnas. "Spin current in (110)-oriented GaAs quantum wells." Thesis, Sumy State University, 2011. http://essuir.sumdu.edu.ua/handle/123456789/20556.

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We consider a possibility of generation of the stationary spin current in (110) – oriented GaAs-basedsymmetric quantum well due to the nonlinear response to externalperiodic electric field. The model includes the Dresselhaus spin-orbit interaction and the random Rashbaspin-orbit coupling. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/20556
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26

Mazzoni, Michele. "Generalized hydrodynamics of a (1+1)-dimensional integrable scattering theory with roaming trajectories." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23209/.

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The emergence of hydrodynamic features in off-equilibrium (1 + 1)-dimensional integrable quantum systems has been the object of increasing attention in recent years. In this Master Thesis, we combine Thermodynamic Bethe Ansatz (TBA) techniques for finite-temperature quantum field theories with the Generalized Hydrodynamics (GHD) picture to provide a theoretical and numerical analysis of Zamolodchikov’s staircase model both at thermal equilibrium and in inhomogeneous generalized Gibbs ensembles. The staircase model is a diagonal (1 + 1)-dimensional integrable scattering theory with the re
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27

Pattinson, Neil. "Spin-current induced torques in nanoscale ferromagnets." Thesis, Lancaster University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420539.

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28

Fördös, Tibor. "Coherent light sources with spin-polarized current." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLX043/document.

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Les spin-lasers sont des dispositifs semi-conducteurs dans lesquels les processus de recombinaison radiative impliquant des porteurs polarisés en spin résultent en une émission de photons polarisés circulairement. Néanmoins, des anisotropies linéaires supplémentaires dans la cavité conduisent généralement à une émission laser préférentiellement polarisée linéairement et à un éventuel couplage entre modes. Dans cette thèse, une méthode générale pour la modélisation de lasers à semi-conducteurs tels que laser à surface verticale (externe) à cavité et contenant des puits quantiques multiples et i
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29

Bansal, Rajni. "Enhancing spin current efficiency using novel materials." Thesis, IIT Delhi, 2019. http://eprint.iitd.ac.in:80//handle/2074/8134.

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30

Eriksson, Oscar, and Kaj Dahl. "Magnetic Monopole Current in Artificial Square Spin Ice." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-154229.

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Recent theoretical and experimental results have revealed the existence of magnetic monopoles, in the form of quasi particles, in both condensed matter known as spin ice, as well as in two-dimensional artificial versions of the same material. In this report a two-dimensional Ising model is first examined, then an artificial square spin ice model using a dipole approximation, only taking into account nearest and next nearest neighbors. The Metropolis algorithm is used to obtain the internal energy, specific heat capacity and entropy as functions of temperature. In the latter model the magnetic
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31

Hankinson, John H. "Spin dependent current injection into epitaxial graphene nanoribbons." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53884.

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Over the past decade there has been a great deal of interest in graphene, a 2-dimensional allotrope of carbon with exceptional mechanical and electrical properties. Its outstanding mobility, minimal size, and mechanical stability make it an appealing material for use in next generation electronic devices. Epitaxial graphene growth on silicon carbide is a reliable, scalable method for the production of high quality graphene films. Recent work has shown that the SiC can be patterned prior to graphitization, in order to selectively grow graphene nanostructures. Graphene nanoribbons grown usin
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32

Abdullah, Ranjdar M. "Spin current amplification by a geometrical ratchet effect." Thesis, University of York, 2015. http://etheses.whiterose.ac.uk/8866/.

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A lateral spin-valve (LSV) is a structure to achieve non-local spin accumulation in future spintronic devices. Although numerous studies have been performed and have demonstrated highly efficient and reliable non-local accumulation, the use of a LSV is still hampered by the small magnitude of spin-current signals. Therefore, this study focused on the amplification of the pure spin-current signals by controlling the geometry of the non-magnetic nanowire in the LSV for the first time. A two-dimensional model was developed based on a diffusion equation and was used for a series of Cu nanowires wi
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33

Pfeiffer, Alexander [Verfasser]. "Pure spin current transport and magnetic state manipulation in lateral spin valves / Alexander Pfeiffer." Mainz : Universitätsbibliothek Mainz, 2020. http://d-nb.info/1203414412/34.

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34

Lee, Soobeom. "Study on Electrical Generation and Manipulation of Spin Current in n-type Si Spin MOSFET." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263671.

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35

Giles, Brandon L. "Opto-thermal measurements of thermally generated spin current in Yttrium Iron Garnet." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1503024951599588.

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36

Sirisathitkul, C. "Studies of transport phenomena at ferromagnet/semiconductor interfaces." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325445.

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37

Mohamad, Haidar Jawad. "Ultrafast optical measurements of spin-polarized electron dynamics in nanostructured magnetic materials." Thesis, University of Exeter, 2015. http://hdl.handle.net/10871/18425.

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At present, electronic devices depend upon electric charge to transfer and record information. However, such devices are approaching a scaling limit due to Joule heating. Spintronics offers a solution by exploiting the spin rather than the charge of the electron, since the propagation of spin current can in principle occur without dissipation. Immediate applications lie in magnetic random access memory and novel media for hard disk recording. Within this thesis, the Magneto-optical Kerr effect (MOKE) has been used to measure the static and dynamic magnetic properties of a number of different t
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38

Edblom, Christin. "Current control of localized spins." Thesis, Uppsala University, Materials Theory, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-126606.

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39

Rohra, Stefan Bruno. "Exact exchange Kohn-Sham spin current density functional theory." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=98054078X.

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40

Wei, Jiaqi. "Magnetization manipulation induced by spin current and ultrafast laser." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0121.

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La manipulation de l’aimantation est un des sujets de recherche les plus étudiés dans le domaine de l’électronique de spin. Différentes méthodes de manipulations peuvent exciter les propriétés dynamiques de l’aimantation à différentes échelles de temps. Parmi les phénomènes dynamiques, la précession de l’aimantation et la désaimantation ultrarapide ont suscité un intérêt particulier. La fréquence de précession de l’aimantation est de l’ordre du GHz et correspond à une période de centaines de picosecondes. Cette précession est le mécanisme à l’œuvre dans les nano-oscillateurs à transfert de spi
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41

Fang, Zhou. "Current-induced torques in ferromagnets at room temperature." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/268099.

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This thesis uses ferromagnetic resonance to explore the current-induced torques (CITs) in two different systems, namely YIG/heavy metal bilayers and bulk NiMnSb, at room temperature. We apply a microwave current to the sample while sweeping the external magnetic field, and measure the longitudinal DC voltage. From a symmetry analysis of the ferromagnetic resonance lineshape, the amplitudes and directions of the CITs parameterised by an effective magnetic field are accurately estimated. In Chapter 4, YIG samples of different thickness, capped by either Pt or Ta, are studied. The resonance is dr
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42

Spicer, Timothy Michael. "Excitation of picosecond magnetisation dynamics by spin transfer torque." Thesis, University of Exeter, 2018. http://hdl.handle.net/10871/34684.

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This thesis presents the results from investigations of ultrafast magnetisation dynamics driven by pure spin currents. Spin orbit coupling in heavy metal layers - such as tungsten, tantalum or platinum - allows for the generation of pure spin currents, whereby spin up and spin down electrons move in opposite directions. Hence, a flow of angular momentum can be controlled through the manipulation of charge current through a heavy metal layer. When a spin current is injected into a ferromagnet, a torque is exerted on its magnetisation, with the potential to induce a wide variety of ultrafast dyn
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43

She, Diana. "Molecular beam epitaxy growth of the BiSb/MnGa heterosrtuctures for the charge current to spin current conversion study." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP003.

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Récemment, les isolants topologiques (TI) ont attiré beaucoup d'attention en raison de leurs propriétés prometteuses potentiellement utiles pour les technologies émergentes, telles que la mémoire MRAM. En effet, les systèmes TI/ferromagnétiques (FM) peuvent réduire considérablement le courant d'écriture en utilisant le renversement par couple spin-orbite (SOT) comme méthode d'écriture. Cet avantage découle de l'utilisation des états de surface topologiques polarisés en spin des TI. Dans ce travail, notre objectif était de faire croître des hétérostructures TI/FM par épitaxie par jets moléculai
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44

Silva, José Felix Estanislau da. "Shot Noise e corrente dependentes de spin: modelo quântico." Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-08032017-091450/.

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Nesta dissertação, fazemos a primeira investigação sobre flutuações em corrente e corrente média dependentes de spin em potenciais duplo e simples da estrutura Zn1-xMnxSe. Consideramos efeitos de campos magnético e elétrico externos à temperatura nula. Na presença de um campo magnético, a interação dos íons de Mn com elétrons de condução e valência (interação de troca sp-d) origina potenciais dependentes de spin para o transporte em Zn1-xMnxSe. Aqui, flutuações em corrente (\"shot noise\") e a corrente média são calculados usando o modelo quântico de transporte através do potencial dependente
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45

Ghosh, Abhijit. "Pompage de spin et absorption de spin dans des hétérostructures magnétiques." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00846031.

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L'interaction entre électrons de conduction itinérants et électrons localisés dans les hétérostructures magnétiques est à l'origine d'effets tels que le transfert de moment de spin, le pompage de spin ou l'effet Hall de spin. Cette thèse est centrée sur le phénomène de pompage de spin : une couche ferromagnétique (FM) en précession injecte un courant de spin pur dans les couches adjacentes. Ce courant de spin peut être partiellement ou totalement absorbé par une couche, dite réservoir de spin, placée directement en contact avec le matériau ferromagnétique ou séparée par une couche d'espacement
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46

Shigematsu, Ei. "Study on transport and conversion of ac and dc spin current generated by magnetization dynamics." Doctoral thesis, Kyoto University, 2020. http://hdl.handle.net/2433/245846.

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京都大学<br>0048<br>新制・課程博士<br>博士(工学)<br>甲第22161号<br>工博第4665号<br>新制||工||1728(附属図書館)<br>京都大学大学院工学研究科電子工学専攻<br>(主査)教授 白石 誠司, 教授 藤田 静雄, 准教授 掛谷 一弘<br>学位規則第4条第1項該当<br>Doctor of Philosophy (Engineering)<br>Kyoto University<br>DGAM
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47

Gladii, Olga. "Spin wave propagation and its modification by an electrical current in Py/Al2O3, Py/Pt and Fe/MgO films." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAE038/document.

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Des mesures d’ondes de spin propagatives ont été réalisées pour caractériser deux effets de l’interaction spin-orbite ainsi que le transport électrique dépendant du spin. Les effets du couplage spin-orbite ont été étudiés dans des bicouches nickel-fer/platine. Dans ces films, les fréquences de deux ondes de spin contre-propageantes ne sont pas les mêmes, ce qui est attribué à l’effet combiné d’une interaction magnétique chirale appelée interaction Dzyaloshinskii-Moriya et d’une asymétrie dans l’épaisseur du film magnétique. En appliquant le courant électrique dans ce système nous avons observé
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48

Inoue, Jun-ichiro, Gerrit E. W. Bauer, and Laurens W. Molenkamp. "Suppression of the persistent spin Hall current by defect scattering." The American Physical Society, 2004. http://hdl.handle.net/2237/7121.

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49

Lin, Weiwei, Kai Chen, Shufeng Zhang, and C. L. Chien. "Enhancement of Thermally Injected Spin Current through an Antiferromagnetic Insulator." AMER PHYSICAL SOC, 2016. http://hdl.handle.net/10150/614754.

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Abstract:
We report a large enhancement of thermally injected spin current in normal metal (NM)/antiferromagnet (AF)/yttrium iron garnet (YIG), where a thin AF insulating layer of NiO or CoO can enhance the spin current from YIG to a NM by up to a factor of 10. The spin current enhancement in NM/AF/YIG, with a pronounced maximum near the Neel temperature of the thin AF layer, has been found to scale linearly with the spin-mixing conductance at the NM/YIG interface for NM = 3d, 4d, and 5d metals. Calculations of spin current enhancement and spin mixing conductance are qualitatively consistent with the ex
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50

Haltz, Eloi. "Domain wall dynamics driven by spin-current in ferrimagnetic alloys." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS607.

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Abstract:
Malgré les grands succès de la spintronique de ces dernières années, plusieurs questions demeurent quant à l'efficacité et la rapidité de la manipulation électrique de l’aimantation. Ces problèmes semblent pouvoir être résolus en considérant des nouveaux matériaux plus exotiques mélangeant différents sous-réseaux magnétiques. Les alliages ferrimagnétiques de type terres rares-métaux de transitions sont composés de deux populations magnétiques couplées antiferromagnétiquement. Dans ces matériaux, deux configurations particulièrement intéressantes se distinguent : les points de compensation magn
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