Dynamics of current-driven spin waves in a confined track

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

Journal of Magnetism and Magnetic Materials Pub Date : 2025-01-18 DOI:10.1016/j.jmmm.2025.172800

Yunxi Jiang , Xi Chen , Chen Xuan , Hem Raj Sharma , Hao Yu

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Abstract

This study investigates the generation, propagation, and decay of current-induced spin waves in a confined magnetic track through both theoretical analysis and numerical simulations. We derive an analytical expression for the spin wave dispersion and amplitude, establishing a linear relationship between the applied current density and the emitted wave frequency. The results reveal a deviation between the spin wave propagation direction and the current direction. As the spin waves decay, domain walls are generated in the system, with the number of domain walls being controlled by the current density and pulse duration. This research has promising applications in the field of spintronic devices, where controlled spin wave dynamics and domain wall creation could improve information processing and data storage. By tuning current-induced spin waves, these findings may support the development of magnetic memory elements, logic devices, and neuromorphic computing architectures that use domain walls for non-volatile memory and reconfigurable processing capabilities.

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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.