自旋-轨道耦合系统的转矩建模

IF 2.1 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Magnetics Pub Date : 2025-01-03 DOI:10.1109/TMAG.2025.3525810

Nils Petter Jørstad;Wolfgang Goes;Siegfried Selberherr;Viktor Sverdlov

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引用次数: 0

摘要

我们用自旋和电荷漂移扩散的耦合方法推广铁磁系统中输运的描述，以解释自旋-轨道转矩（SOTs）对磁化的作用。我们同时考虑了块体和界面自旋轨道耦合（SOC），并研究了块体中横向自旋输运。我们比较了我们的方法与典型的假设，横向自旋电流被瞬间吸收在铁磁体。此外，我们研究了强界面Rashba SOC对扭矩的厚度和角依赖性的影响，并证明了它在捕获文献中实验报告的行为方面的重要性。

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Modeling Torques in Systems With Spin-Orbit Coupling

We generalize the description of transport in ferromagnetic (FM) systems using a coupled spin and charge drift-diffusion approach to account for the spin-orbit torques (SOTs) acting on the magnetization. We consider both bulk and interfacial spin-orbit coupling (SOC) and treat the transverse spin transport in the bulk of ferromagnets. We compare our approach with the typical assumption that the transverse spin currents are instantaneously absorbed in the ferromagnet. Furthermore, we investigate the effects of a strong interfacial Rashba SOC on the thickness and angular dependence of the torques, and we demonstrate its importance in capturing the behavior reported by experiments in the literature.

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来源期刊

IEEE Transactions on Magnetics 工程技术-工程：电子与电气

CiteScore

4.00

自引率

14.30%

发文量

565

审稿时长

4.1 months

期刊介绍： Science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage. The IEEE Transactions on Magnetics publishes scholarly articles of archival value as well as tutorial expositions and critical reviews of classical subjects and topics of current interest.