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Asymmetric dynamic behaviors of magnetic domain wall in trapezoid-cross-section nanostrip

Title
Asymmetric dynamic behaviors of magnetic domain wall in trapezoid-cross-section nanostrip
Authors
Ma, Xiao-PingPiao, Hong-GuangYang, LeiKim, Dong-HyunYou, Chun-YeolPan, Liqing
DGIST Authors
Ma, Xiao-Ping; Piao, Hong-Guang; Yang, Lei; Kim, Dong-Hyun; You, Chun-Yeol; Pan, Liqing
Issue Date
2020-08
Citation
Chinese Physics B, 29(9), 097502
Type
Article
Article Type
Article
Author Keywords
ferromagnetic nanowiremagnetic domain wallgeometric effectasymmetric Walker breakdown
ISSN
1674-1056
Abstract
Field-driven magnetic domain wall propagation in ferromagnetic nanostrips with trapezoidal cross section has been systematically investigated by means of micromagnetic simulation. Asymmetric dynamic behaviors of domain wall, depending on the propagation direction, were observed under an external magnetic field. When the domain walls propagate in the opposite direction along the long axis of the nanostrip, the Walker breakdown fields as well as the average velocities are different. The asymmetric landscape of demagnetization energies, which arises from the trapezoidal geometry, is the main origin of the asymmetric propagation behavior. Furthermore, a trapezoid-cross-section nanostrip will become a nanotube if it is rolled artificially along its long axis, and thus a two-dimensional transverse domain wall will become a three-dimensional one. Interestingly, it is found that the asymmetric behaviors observed in two-dimensional nanostrips with trapezoidal cross section are similar with some dynamic properties occurring in three-dimensional nanotubes. © 2020 Chinese Physical Society and IOP Publishing Ltd.
URI
http://hdl.handle.net/20.500.11750/12630
DOI
10.1088/1674-1056/aba09a
Publisher
IOP Publishing Ltd
Related Researcher
  • Author You, Chun-Yeol Spin Phenomena for Information Nano-devices(SPIN) Lab
  • Research Interests Spintronics; Condensed Matter Physics; Magnetic Materials & Thin Films; Micromagnetic Simulations; Spin Nano-Devices
Files:
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Collection:
Department of Emerging Materials ScienceSpin Phenomena for Information Nano-devices(SPIN) Lab1. Journal Articles


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