铁磁自旋阀的超快自旋动力学与自旋输运

IF 2.5 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-16 DOI:10.1016/j.jmmm.2025.173247

V.N. Gridnev

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引用次数: 0

摘要

对近年来激光诱导稀土自旋阀单次亚皮秒磁化开关的实验观察进行了理论分析。利用Landau-Lifshitz-Bloch方程和自旋阀中自旋输运的Valet-Fert理论，数值计算了单激光脉冲入射自旋阀时的自旋动力学，包括自旋输运。我们证明了单个激光脉冲可以在平行和反平行结构之间切换一对铁磁层的相对磁化。讨论了计算结果与实验观测结果的关系。

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Ultrafast spin dynamics and spin transport in ferromagnetic spin valve

We analyze theoretically the recent experimental observation of laser-induced single-shot subpicosecond magnetization switching in rare-earth free spin valves. Using the Landau–Lifshitz–Bloch equation and Valet–Fert theory of spin transport in spin valve we numerically calculate the spin dynamics, including spin transport in spin-valves, upon incidence of a single laser pulse. We show that a single laser pulse can switch relative magnetizations of a pair of ferromagnetic layers between parallel and antiparallel configurations. Relation of our calculation to the experimental observation is discussed.

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来源期刊

Journal of Magnetism and Magnetic Materials 物理-材料科学：综合

CiteScore

5.30

自引率

11.10%

发文量

1149

审稿时长

59 days

期刊介绍： The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public. Main Categories: Full-length articles: Technically original research documents that report results of value to the communities that comprise the journal audience. The link between chemical, structural and microstructural properties on the one hand and magnetic properties on the other hand are encouraged. In addition to general topics covering all areas of magnetism and magnetic materials, the full-length articles also include three sub-sections, focusing on Nanomagnetism, Spintronics and Applications. The sub-section on Nanomagnetism contains articles on magnetic nanoparticles, nanowires, thin films, 2D materials and other nanoscale magnetic materials and their applications. The sub-section on Spintronics contains articles on magnetoresistance, magnetoimpedance, magneto-optical phenomena, Micro-Electro-Mechanical Systems (MEMS), and other topics related to spin current control and magneto-transport phenomena. The sub-section on Applications display papers that focus on applications of magnetic materials. The applications need to show a connection to magnetism. Review articles: Review articles organize, clarify, and summarize existing major works in the areas covered by the Journal and provide comprehensive citations to the full spectrum of relevant literature.