Dynamic pinning and phase stability of transverse domain walls in asymmetric tie-shaped nanowires for spintronic applications

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

Journal of Magnetism and Magnetic Materials Pub Date : 2025-01-26 DOI:10.1016/j.jmmm.2025.172828

Xiao-Xue Yang , Huiting Li , Je-Ho Shim, Xue-Feng Zhang, Xiao-Ping Ma, Junyan Gao, Xing Ri Jin, Hong-Guang Piao

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引用次数: 0

Abstract

The dynamic control and phase stability of transverse domain walls (TDWs) in nanowires are pivotal for advancing spintronic technologies. This study uses micromagnetic simulations to investigate TDWs in asymmetric Tie-shaped permalloy nanowires (T-NWs). By exploiting the continuously varying width of T-NWs, we uncover the intricate mechanisms of TDW pinning and motion under applied magnetic fields. Our findings highlight stable pinning processes and identify critical instabilities that herald phase transitions to vortex domain walls (VDWs). We systematically analyze non-equilibrium energy dynamics, including exchange, anisotropy, and Zeeman energies, and we elucidate the energy dissipation pathways and their role in TDW stabilization. The results reveal that TDW phase stability is highly sensitive to geometric asymmetry, providing key insights for optimizing nanowire designs to enhance TDW control. These insights pave the way for more efficient spintronic devices, particularly in applications requiring high-speed domain wall manipulation and robust magnetic state retention.

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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.