Littérature scientifique sur le sujet « Orbital Magnetization »
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Articles de revues sur le sujet "Orbital Magnetization"
Cheng, Fang, Wang Zhi-Gang, Li Shu-Shen et Zhang Ping. « Orbital magnetization in semiconductors ». Chinese Physics B 18, no 12 (décembre 2009) : 5431–36. http://dx.doi.org/10.1088/1674-1056/18/12/050.
Texte intégralTHONHAUSER, T. « THEORY OF ORBITAL MAGNETIZATION IN SOLIDS ». International Journal of Modern Physics B 25, no 11 (30 avril 2011) : 1429–58. http://dx.doi.org/10.1142/s0217979211058912.
Texte intégralSimon, Steven H., Ady Stern et Bertrand I. Halperin. « Composite fermions with orbital magnetization ». Physical Review B 54, no 16 (15 octobre 1996) : R11114—R11117. http://dx.doi.org/10.1103/physrevb.54.r11114.
Texte intégralResta, R., Davide Ceresoli, T. Thonhauser et David Vanderbilt. « Orbital Magnetization in Extended Systems ». ChemPhysChem 6, no 9 (12 septembre 2005) : 1815–19. http://dx.doi.org/10.1002/cphc.200400641.
Texte intégralLEE, Soogil, Nyun Jong LEE, Min-Gu KANG et Byong-Guk PARK. « Magnetization Control through the Orbital Current : Orbitronics beyond Spintronics ». Physics and High Technology 29, no 10 (31 octobre 2020) : 16–21. http://dx.doi.org/10.3938/phit.29.035.
Texte intégralTrama, Mattia, Vittorio Cataudella, Carmine Antonio Perroni, Francesco Romeo et Roberta Citro. « Tunable Spin and Orbital Edelstein Effect at (111) LaAlO3/SrTiO3 Interface ». Nanomaterials 12, no 14 (20 juillet 2022) : 2494. http://dx.doi.org/10.3390/nano12142494.
Texte intégralSuzuki, Kenji, et Yoshiyuki Ono. « Orbital Magnetization in Quantum Hall Regime ». Journal of the Physical Society of Japan 66, no 11 (15 novembre 1997) : 3536–42. http://dx.doi.org/10.1143/jpsj.66.3536.
Texte intégralEntin-Wohlman, O., Y. Imry, A. G. Aronov et Y. Levinson. « Orbital magnetization in the hopping regime ». Physical Review B 51, no 17 (1 mai 1995) : 11584–96. http://dx.doi.org/10.1103/physrevb.51.11584.
Texte intégralKUSMARTSEV, F. V. « ORBITAL PARAMAGNETISM IN TWO-DIMENSIONAL LATTICES ». Modern Physics Letters B 05, no 08 (10 avril 1991) : 571–79. http://dx.doi.org/10.1142/s021798499100068x.
Texte intégralTschirhart, C. L., M. Serlin, H. Polshyn, A. Shragai, Z. Xia, J. Zhu, Y. Zhang et al. « Imaging orbital ferromagnetism in a moiré Chern insulator ». Science 372, no 6548 (27 mai 2021) : 1323–27. http://dx.doi.org/10.1126/science.abd3190.
Texte intégralThèses sur le sujet "Orbital Magnetization"
Bianco, Raffaello. « Chern invariant and orbital magnetization as local quantities ». Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/9959.
Texte intégralLa geometria, e la topologia in particolare, rivestono un profondo ruolo in molti campi della fisica ed in particolare in materia condensata ove è possibile identificare diversi stati quantistici della materia attraverso proprietà topologiche. L'invariante di Chern è un invariante topologico che caratterizza lo stato isolante dei cristalli. Esso è definito attraverso la descrizione in spazio reciproco di un cristallo perfetto, per cui è necessario considerare un sistema infinito oppure finito ma con condizioni periodiche al bordo. In questa tesi il concetto di invariante di Chern viene generalizzato definendo un opportuno marcatore locale di Chern in spazio reale. Infatti se si considera un cristallo perfetto infinito oppure finito e con condizioni periodiche al bordo, la media sulla cella elementare di questo marcatore restituisce il consueto invariante di Chern. Tuttavia, grazie al suo carattere locale, il marcatore di Chern è ben definito e può essere utilizzato per identificare il carattere locale di Chern anche di un sistema microscopicamente disordinato o macroscopicamente disomogeneo (ad esempio etorogiunzioni di diversi cristalli) e con qualsiasi tipo di condizioni al bordo (periodiche o aperte). Nella seconda parte della tesi l'invariante locale di Chern viene utilizzato per fornire una descrizione locale in spazio reale della magentizzazione orbitale. Questa descrizione è utilizzabile sia con condizioni al bordo aperte che periodiche e quindi unifica i due separati approcci utilizzati in questi due casi. La nuova formula permette, inoltre, di ottenere anche una migliore comprensione del ruolo che gli stati di bordo rivestono nella magnetizzazione di un sistema. In entrambi i casi vengono presentati i risultati di simulazioni numeriche che confermano i risultati teorici derivati.
The geometry and the topology play a profound role in many fields of physics and in particular in condensed matter where it is possible to identify different quantum states of matter through their topological properties. The Chern invariant is a topological invariant which characterizes the insulating state of crystals. It is defined through the description in the reciprocal space of a perfect crystal, which then has to be considered as an infinite system or a finite size system with periodic boundary conditions. In this thesis the concept of Chern invariant is generalized by defining a local Chern marker in the real space. For an infinite crystal or a finite crystal with periodic boundary conditions, the average of this marker over an elementary unit cell returns the usual invariant Chern. However, thanks to its local character, the Chern marker is well defined and can be used to identify the local Chern character also of microscopically disordered systems or macroscopically inhomogeneous systems (e.g. heterojunctions of different crystals) and with any kind of boundary conditions adopted (periodic boundary conditions or open bounday conditions as well). In the second part of the thesis the local Chern invariant is used to provide a local description in the real space of the orbital magnetization. This description can be used both with open and periodic boundary conditions, so it unifies the two separate approaches used in these different cases. Moreover, the new formula makes it possible to get a better understanding of the role that the edge states play in the magnetization of a system. In both cases we present the results of numerical simulations that confirm the theoretical results.
XXVI Ciclo
1979
Zhang, Shulei. « Spin Transport and Magnetization Dynamics in Various Magnetic Systems ». Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/333352.
Texte intégralMondal, Ritwik. « Relativistic theory of laser-induced magnetization dynamics ». Doctoral thesis, Uppsala universitet, Materialteori, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-315247.
Texte intégralMartin, Konstantin [Verfasser], et Charles [Gutachter] Gould. « Current-induced Magnetization Switching by a generated Spin-Orbit Torque in the 3D Topological Insulator Material HgTe / Konstantin Martin ; Gutachter : Charles Gould ». Würzburg : Universität Würzburg, 2021. http://d-nb.info/1236548086/34.
Texte intégralShokeen, Vishal. « Ultrafast magnetization dynamics in ferromagnetic transition metals : a study of spins thermalization induced by femtosecond optical pulses and of coupled oscillators excited by picosecond acoustic pulses ». Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAE035.
Texte intégralIn this thesis, we have investigated the magnetization dynamics at picosecond and femtosecond time scale using time resolved magneto-optical pump probe technique. At picosecond time scale, the magnetization precession is induced by ultrafast acoustic pulses in a three layered structure with two ferromagnetic layers separated by varying thickness of metallic spacer layer (Ni/Au/Py). The magnetization precession dynamics of the Ni layer is modified due to the interlayer exchange interaction with the Py layer and the synchronized precession of the coupied ferromagnetic layers has been observed. At the timescale of 50fs, coherent magneto-optical, non-thermal, thermal and relaxation dynamics of charges and spins in ferromagnetic transition metals (Ni, Co and Fe) is studied by using 11fs optical pulses in a very low perturbation regime. The spin orbit interaction and exchange interaction play a significant role in the demagnetization of the ferromagnetic metals induced by femtosecond pulses
Sanches, Piaia Monica. « Femtosecond magneto-optical four-wave mixing in Garnet films ». Thesis, Strasbourg, 2014. http://www.theses.fr/2014STRAE024/document.
Texte intégralOne of the goals of Femtomagnetism is to manipulate the magnetization of materials using femtosecond optical pulses. It has been shown in ferromagnetic films that a magneto-optical (MO) coherent response takes place before the thermalization of the spins populations in a pump and probe MOKE experiment. It results from the coherent spin-photon coupling mediated by the spin-orbit interaction. A simplified description of this effect has been made by considering an eight-level system coupled with the laser field. The MO coherence can be defined by the magnetic field dependent dephasing time T2MO. In the present work, it is shown that the coherent MO response of a bismuth-doped garnet can be directly measured in different degenerated MO four-wave mixing configurations. The importance of well-knowing the spectral phase of the pulse to measure T2MO was studied. Using 10fs near infra-red pulses, T2MO was shown to be (2.8+/-1)fs that is of the same order of the charges dephasing time
Locht, Inka L. M. « Theoretical methods for the electronic structure and magnetism of strongly correlated materials ». Doctoral thesis, Uppsala universitet, Materialteori, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-308699.
Texte intégralWang, Tzu-Cheng, et 王子政. « First principle study of anomalous Hall effect and orbital magnetization in non-collinear antiferromagnets Mn3X (X=Rh, Ir, Pt, Ga, Ge, Sn) ». Thesis, 2017. http://ndltd.ncl.edu.tw/handle/bnq8tq.
Texte intégral國立臺灣大學
物理學研究所
105
The anomalous Hall effect (AHE) can be considered as a kind of Hall effect without external magnetic field. It has been thought to be present only in ferromagnetic conductors, with its size being proportional to the net magnetization. Using the Berry phase concept and first principle calculations, physicists recently demonstrated that large AHE may appear in noncollinear antiferromagnets, which is driven by the non-vanishing Berry curvature because of the symmetry breaking of their magnetic configuration and spin-orbit coupling. While the spintronics are becoming promising, the understanding of the antiferromagnets are of interest for its development. In this thesis, we study the electronic and magnetic structure of the noncollinear antiferromagnets Mn3X (X=Ga, Ge, Sn, Ir, Rh, Pt) by first principles density functional theory calculations. At broken-symmetry direction, the anomalous Hall conductivity is about 100 to 300 (S/cm), which has the same order as the normal ferromagnetic iron. We also study their orbital magnetization by modern theory of orbital magnetization. The magnitude of orbital magnetization in Mn3Rh, Mn3Ir and Mn3Pt is equivalent to spin magnetization. As for Mn3Ga, Mn3Ge and Mn3Sn, their orbital magnetization is even larger than spin magnetization. The results could explain that the weak ferromagnetism observed in experiments, is caused by the orbital contribution, instead of the spin contribution that dominates the magnetization in most of the magnetic system.
Li, Hang. « Spin Orbit Torque in Ferromagnetic Semiconductors ». Diss., 2016. http://hdl.handle.net/10754/614071.
Texte intégralHache, Toni. « Frequency control of auto-oscillations of the magnetization in spin Hall nano-oscillators ». 2020. https://monarch.qucosa.de/id/qucosa%3A74194.
Texte intégralDiese Arbeit demonstriert experimentell vier verschiedene Methoden der Frequenzkontrolle magnetischer Auto-Oszillationen in Spin Hall Nano-Oszillatoren (SHNOs). Durch externe magnetische Felder kann die Frequenz im GHz-Bereich geändert werden, wie es in dieser Arbeit gezeigt wird. Dies erfordert jedoch große Elektromagneten, deren Nutzung für zukünftige Anwendungen der SHNOs nicht geeignet sind. Aufgrund der nichtlinearen Kopplung zwischen Oszillatorleistung und Oszillatorfrequenz, lässt sich letztere durch den Versorgungsstrom beeinflussen. Dies ist typischerweise in einem Bereich von mehreren 100 MHz möglich, wie es an mehreren Stellen dieser Arbeit gezeigt wird. Im ersten Abschnitt des Ergebnisteils wird die Synchronisation der magnetischen Auto-Oszillationen zu einer externen Mikrowellenanregung demonstriert. Der zusätzlich eingespeiste Mikrowellenstrom erzeugt eine Modulation des effektiven Magnetfelds, was zur Wechselwirkung mit den Auto-Oszillationen führt. Diese synchronisieren über eine Frequenzdifferenz von mehreren 100 MHz. In diesem Bereich lässt sich die Frequenz der Auto-Oszillation mit der äußeren Frequenz steuern. Innerhalb des Synchronisationsbereichs wird außerdem eine Erhöhung der Leistung und eine Verringerung der Linienbreite der Auto-Oszillationen festgestellt. Dies wird mit einer Erhöhung der Kohärenz der Auto-Oszillationen erklärt. Neben der zusätzlichen Einspeisung eines Mikrowellenstroms können die Auto-Oszillationen auch zu einem magnetischen Wechselfeld synchronisieren, welches von einer frei beweglichen Antenne erzeugt wird, die über dem SHNO positioniert wird. Im zweiten Abschnitt des Ergebnisteils wird ein bipolares Konzept eines SHNO vorgestellt und seine Funktionsfähigkeit experimentell nachgewiesen. Im Vergleich zu konventionellen SHNOs erzeugen bipolare SHNOs Auto-Oszillationen für beide Polaritäten des elektrischen Versorgungsstroms und beide Richtungen des externen Magnetfelds. Dies wird durch die Kombination zweier ferromagnetischer Lagen in einem SHNO erreicht. Die Kombination unterschiedlicher ferromagnetischer Materialien kann genutzt werden, um die Mikrowellenfrequenz in Abhängigkeit der Stromrichtung zu ändern, da diese bestimmt in welcher Lage die Auto-Oszillationen erzeugt werden können. Durch eine geeignete Materialkombination kann die Frequenz im GHz-Bereich geändert werden, wenn die Strompolarität umgekehrt wird.
Livres sur le sujet "Orbital Magnetization"
Lovesey, S. W. The orbital magnetization of a matt insulator V2 O3 : Revealed by resonant x-ray Bragg diffraction. Chilton : Rutherford Appleton Laboratory, 2001.
Trouver le texte intégralVanderbilt, David. Berry Phases in Electronic Structure Theory : Electric Polarization, Orbital Magnetization and Topological Insulators. Cambridge University Press, 2018.
Trouver le texte intégralLaunay, Jean-Pierre, et Michel Verdaguer. The localized electron : magnetic properties. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198814597.003.0002.
Texte intégralEriksson, Olle, Anders Bergman, Lars Bergqvist et Johan Hellsvik. Applications of Density Functional Theory. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198788669.003.0003.
Texte intégralEriksson, Olle, Anders Bergman, Lars Bergqvist et Johan Hellsvik. Atomistic Spin Dynamics. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198788669.001.0001.
Texte intégralChapitres de livres sur le sujet "Orbital Magnetization"
Resta, Raffaele. « Electrical Polarization and Orbital Magnetization : The Position Operator Tamed ». Dans Handbook of Materials Modeling, 151–81. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-44677-6_12.
Texte intégralResta, Raffaele. « Electrical Polarization and Orbital Magnetization : The Position Operator Tamed ». Dans Handbook of Materials Modeling, 1–31. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-42913-7_12-1.
Texte intégralWiegers, S., E. Bibow, L. P. Lévy, V. Bayot, M. Simmons et M. Shayegan. « Magnetization and Orbital Properties of the Two-Dimensional Electron Gas in the Quantum Limit ». Dans Exotic States in Quantum Nanostructures, 99–138. Dordrecht : Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-015-9974-0_3.
Texte intégralvan der Laan, Gerrit. « Magnetic X-Ray Dichroism. An Effective way to Study the Spin and Orbital Magnetization in Magnetic Materials ». Dans Polarized Electron/Polarized Photon Physics, 295–309. Boston, MA : Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-1418-7_22.
Texte intégralKorostil, A. M., et M. M. Krupa. « Magnetization in Nanostructures with Strong Spin–Orbit Interaction ». Dans Springer Proceedings in Physics, 35–102. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-18543-9_4.
Texte intégralBhowmik, Debanjan, OukJae Lee, Long You et Sayeef Salahuddin. « Magnetization Switching and Domain Wall Motion Due to Spin Orbit Torque ». Dans Nanomagnetic and Spintronic Devices for Energy-Efficient Memory and Computing, 165–87. Chichester, UK : John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781118869239.ch6.
Texte intégralNewnham, Robert E. « Magnetic phenomena ». Dans Properties of Materials. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780198520757.003.0016.
Texte intégral« 14. Spin-orbit interactions, spin currents, and magnetization dynamics in superconductor/ferromagnet hybrids ». Dans Superconductors at the Nanoscale, 441–72. De Gruyter, 2017. http://dx.doi.org/10.1515/9783110456806-015.
Texte intégralActes de conférences sur le sujet "Orbital Magnetization"
Amano, T., Y. Kawakami, H. Itoh, T. Aoyama, Y. Imai, K. Ohgushi, Y. Nakamura, H. Kishida, K. Yonemitsu et S. Iwai. « Ultrafast magnetization driven by spiral current in Kitaev spin liquid α-RuCl3 ». Dans International Conference on Ultrafast Phenomena. Washington, D.C. : Optica Publishing Group, 2022. http://dx.doi.org/10.1364/up.2022.tu2a.2.
Texte intégralCrawford, David A. « Simulations of Magnetic Fields Produced by Asteroid Impact : Possible Implications for Planetary Paleomagnetism ». Dans 2019 15th Hypervelocity Impact Symposium. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/hvis2019-032.
Texte intégralHoffmann, Axel F., Wei Zhang, Joseph Sklenar, Matthias Benjamin Jungfleisch, Wanjun Jiang, Bo Hsu, Jiao Xiao et al. « Driving magnetization dynamics with interfacial spin-orbit torques (Conference Presentation) ». Dans Spintronics IX, sous la direction de Henri-Jean Drouhin, Jean-Eric Wegrowe et Manijeh Razeghi. SPIE, 2016. http://dx.doi.org/10.1117/12.2238782.
Texte intégralZhu, Lijun, D. C. Ralph et R. A. Buhrman. « Switching Current Density of Perpendicular Magnetization by Spin-Orbit Torque ». Dans 2021 IEEE 32nd Magnetic Recording Conference (TMRC). IEEE, 2021. http://dx.doi.org/10.1109/tmrc53175.2021.9605123.
Texte intégralPeng, S. Z., J. Q. Lu, W. X. Li, L. Z. Wang, H. Zhang, X. Li, K. L. Wang et W. S. Zhao. « Field-Free Switching of Perpendicular Magnetization through Voltage-Gated Spin-Orbit Torque ». Dans 2019 IEEE International Electron Devices Meeting (IEDM). IEEE, 2019. http://dx.doi.org/10.1109/iedm19573.2019.8993513.
Texte intégralOhya, Shinobu, Miao Jiang, Hirokatsu Asahara, Shoichi Sato et Masaaki Tanaka. « Efficient spin-orbit-torque magnetization switching in a spin-orbit ferromagnetic-semiconductor (Ga,Mn)As single layer ». Dans Spintronics XIV, sous la direction de Henri-Jean M. Drouhin, Jean-Eric Wegrowe et Manijeh Razeghi. SPIE, 2021. http://dx.doi.org/10.1117/12.2595843.
Texte intégralLi, S., et W. Lew. « Chiral Magnetization Switching Induced by Spin Orbit Torque in Pt/Co/Ta Structure. » Dans 2018 IEEE International Magnetic Conference (INTERMAG). IEEE, 2018. http://dx.doi.org/10.1109/intmag.2018.8508473.
Texte intégralZhu, L., X. Xu, K. Meng, Y. Wu, J. Miao et Y. Jiang. « Spin-Orbit Torque Induced Magnetization Switching In Co/Pt Multilayer-based Synthetic Antiferromagnets. » Dans 2018 IEEE International Magnetic Conference (INTERMAG). IEEE, 2018. http://dx.doi.org/10.1109/intmag.2018.8508775.
Texte intégralLi, Zuwei, Zhaohao Wang, Yang Liu et Weisheng Zhao. « Micromagnetic Simulation of Spin-Orbit Torque Induced Ultrafast Switching of In-Plane Magnetization ». Dans 2018 IEEE 18th International Conference on Nanotechnology (IEEE-NANO). IEEE, 2018. http://dx.doi.org/10.1109/nano.2018.8626252.
Texte intégralWang, Zhaohao, Zuwei Li, Yang Liu, Simin Li, Liang Chang, Wang Kang, Youguang Zhang et Weisheng Zhao. « Progresses and challenges of spin orbit torque driven magnetization switching and application (Invited) ». Dans 2018 IEEE International Symposium on Circuits and Systems (ISCAS). IEEE, 2018. http://dx.doi.org/10.1109/iscas.2018.8351767.
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