中国物理B ›› 2025, Vol. 34 ›› Issue (10): 107512-107512.doi: 10.1088/1674-1056/ade071

• • 上一篇    下一篇

Stability and characteristic modes of skyrmions in magnetic nanotubes

Tijjani Abdulrazak1,2,†, Qizhi Cai(蔡淇智)1,3, and Guangwei Deng(邓光伟)1,3,4,‡   

  1. 1 Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China;
    2 Department of Physics, Bayero University, Kano 700006, Nigeria;
    3 Key Laboratory Quantum Physics and Photonic Quantum Information, Ministry of Education, University of Electronic Science and Technology of China, Chengdu 610054, China;
    4 Institute of Electronics and Information Industry Technology of Kash, Kash 844000, China
  • 收稿日期:2025-04-17 修回日期:2025-05-30 接受日期:2025-06-04 发布日期:2025-09-29
  • 通讯作者: Tijjani Abdulrazak, Guangwei Deng E-mail:atijjani.phy@buk.edu.ng;gwdeng@uestc.edu.cn
  • 基金资助:
    Project supported by the National Key Research and Development Program of China (Grant No. 2022YFA1405900), the National Natural Science Foundation of China (Grant Nos. U2441217 and 12074058), and Sichuan Science and Technology Program (Grant No. 2024YFHZ0372).

Stability and characteristic modes of skyrmions in magnetic nanotubes

Tijjani Abdulrazak1,2,†, Qizhi Cai(蔡淇智)1,3, and Guangwei Deng(邓光伟)1,3,4,‡   

  1. 1 Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China;
    2 Department of Physics, Bayero University, Kano 700006, Nigeria;
    3 Key Laboratory Quantum Physics and Photonic Quantum Information, Ministry of Education, University of Electronic Science and Technology of China, Chengdu 610054, China;
    4 Institute of Electronics and Information Industry Technology of Kash, Kash 844000, China
  • Received:2025-04-17 Revised:2025-05-30 Accepted:2025-06-04 Published:2025-09-29
  • Contact: Tijjani Abdulrazak, Guangwei Deng E-mail:atijjani.phy@buk.edu.ng;gwdeng@uestc.edu.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant No. 2022YFA1405900), the National Natural Science Foundation of China (Grant Nos. U2441217 and 12074058), and Sichuan Science and Technology Program (Grant No. 2024YFHZ0372).

RichHTML

0

PDF (PC)

16

赞

摘要： We study the stability and dynamic behaviors of skyrmions in magnetic nanotubes, where curvature and cylindrical symmetry provide unique mechanisms for skyrmion formation and control. Unlike planar geometries, skyrmions confined in nanotubes exhibit elliptical shapes, stabilized through the interplay of curvature-induced effects, Dzyaloshinskii-Moriya interaction (DMI), and magnetic anisotropy. Using micromagnetic simulations, we construct phase diagrams of skyrmion stability as functions of DMI strength and anisotropy, identifying transitions to saturated or helical configurations in unstable regimes. The dynamics reveal distinct counterclockwise gyration modes, strongly influenced by tube geometry and applied microwave fields. We find that external magnetic fields significantly enhance the azimuthal velocity ($\bar{v}_\phi$) while maintaining a consistent axial motion ($\bar{v}_z$) along the $-z$-direction. Furthermore, transitions between gyration and linear translation modes emerge, governed by the combined effects of magnetic field, DMI, and curvature. Notably, the skyrmion's motion direction depends on the excitation mode and DMI sign, while curvature-modified spin textures produce effective fields without conventional pinning. These results demonstrate that magnetic nanotubes offer a robust and tunable platform for skyrmion manipulation, with potential applications in next-generation memory and logic devices. Our findings also highlight the role of curvature in enabling stable and controllable topological spin textures for advanced spintronic technologies.

关键词: ferromagnetic, magnetic field, MuMax3 software, skyrmion, spin wave

Abstract: We study the stability and dynamic behaviors of skyrmions in magnetic nanotubes, where curvature and cylindrical symmetry provide unique mechanisms for skyrmion formation and control. Unlike planar geometries, skyrmions confined in nanotubes exhibit elliptical shapes, stabilized through the interplay of curvature-induced effects, Dzyaloshinskii-Moriya interaction (DMI), and magnetic anisotropy. Using micromagnetic simulations, we construct phase diagrams of skyrmion stability as functions of DMI strength and anisotropy, identifying transitions to saturated or helical configurations in unstable regimes. The dynamics reveal distinct counterclockwise gyration modes, strongly influenced by tube geometry and applied microwave fields. We find that external magnetic fields significantly enhance the azimuthal velocity ($\bar{v}_\phi$) while maintaining a consistent axial motion ($\bar{v}_z$) along the $-z$-direction. Furthermore, transitions between gyration and linear translation modes emerge, governed by the combined effects of magnetic field, DMI, and curvature. Notably, the skyrmion's motion direction depends on the excitation mode and DMI sign, while curvature-modified spin textures produce effective fields without conventional pinning. These results demonstrate that magnetic nanotubes offer a robust and tunable platform for skyrmion manipulation, with potential applications in next-generation memory and logic devices. Our findings also highlight the role of curvature in enabling stable and controllable topological spin textures for advanced spintronic technologies.

Key words: ferromagnetic, magnetic field, MuMax3 software, skyrmion, spin wave

中图分类号:  (Ferrimagnetics)

  • 75.50.Gg
71.35.Ji (Excitons in magnetic fields; magnetoexcitons) 12.39.Dc (Skyrmions) 75.30.Ds (Spin waves)