中国物理B ›› 2018, Vol. 27 ›› Issue (7): 77505-077505.doi: 10.1088/1674-1056/27/7/077505

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Domain wall dynamics in magnetic nanotubes driven by an external magnetic field

Zai-Dong Li(李再东), Yue-Chuan Hu(胡月川), Peng-Bin He(贺鹏斌), Lin-Lin Sun(孙琳琳)   

  1. 1 Department of Applied Physics, Hebei University of Technology, Tianjin 300401, China;
    2 Key Laboratory of Electronic Materials and Devices of Tianjin, School of Electronics and Information Engineering, Hebei University of Technology, Tianjin 300401, China;
    3 School of Physics and Electronics, Hunan University, Changsha 410082, China;
    4 School of Public Management, Beihang University, Beijing 100191, China
  • 收稿日期:2018-03-01 修回日期:2018-04-11 出版日期:2018-07-05 发布日期:2018-07-05
  • 通讯作者: Zai-Dong Li, Lin-Lin Sun E-mail:lizd@hebut.edu.cn;vickysunlin@126.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61774001), the National Social Science Foundation of China (Grant No. 17BJY103), the Key Project of Scientific and Technological Research in Hebei Province, China (Grant No. ZD2015133), and the Construction Project of Graduate Demonstration Course in Hebei Province, China (Grant No. 94/220079). Peng-Bin He was supported by the Natural Science Foundation of Hunan Province, China (Grant No. 2017JJ2045).

Domain wall dynamics in magnetic nanotubes driven by an external magnetic field

Zai-Dong Li(李再东)1,2, Yue-Chuan Hu(胡月川)1, Peng-Bin He(贺鹏斌)3, Lin-Lin Sun(孙琳琳)4   

  1. 1 Department of Applied Physics, Hebei University of Technology, Tianjin 300401, China;
    2 Key Laboratory of Electronic Materials and Devices of Tianjin, School of Electronics and Information Engineering, Hebei University of Technology, Tianjin 300401, China;
    3 School of Physics and Electronics, Hunan University, Changsha 410082, China;
    4 School of Public Management, Beihang University, Beijing 100191, China
  • Received:2018-03-01 Revised:2018-04-11 Online:2018-07-05 Published:2018-07-05
  • Contact: Zai-Dong Li, Lin-Lin Sun E-mail:lizd@hebut.edu.cn;vickysunlin@126.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61774001), the National Social Science Foundation of China (Grant No. 17BJY103), the Key Project of Scientific and Technological Research in Hebei Province, China (Grant No. ZD2015133), and the Construction Project of Graduate Demonstration Course in Hebei Province, China (Grant No. 94/220079). Peng-Bin He was supported by the Natural Science Foundation of Hunan Province, China (Grant No. 2017JJ2045).

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摘要： We use the Landau-Lifshitz-Gilbert equation to investigate field-driven domain wall propagation in magnetic nanotubes. We find that the distortion is maximum as the time becomes infinite and the exact rigid-body solutions are obtained analytically. We also find that the velocity increases with increasing the ratio of inner radius and outer radius. That is to say, we can accelerate domain wall motion not only by increasing the magnetic field, but also by reducing the thickness of the nanotubes.

关键词: domain wall, magnetic nanotubes, magnetic field

Abstract: We use the Landau-Lifshitz-Gilbert equation to investigate field-driven domain wall propagation in magnetic nanotubes. We find that the distortion is maximum as the time becomes infinite and the exact rigid-body solutions are obtained analytically. We also find that the velocity increases with increasing the ratio of inner radius and outer radius. That is to say, we can accelerate domain wall motion not only by increasing the magnetic field, but also by reducing the thickness of the nanotubes.

Key words: domain wall, magnetic nanotubes, magnetic field

中图分类号:  (Magnetization dynamics)

  • 75.78.-n
75.40.Gb (Dynamic properties?) 72.25.Ba (Spin polarized transport in metals)