Controllable transport of a skyrmion in a ferromagnetic narrow channel with voltage-controlled magnetic anisotropy

Junlin Wang, Jing Xia, Xichao Zhang, G. P. Zhao, Lei Ye, Jing Wu, Yongbing Xu, Weisheng Zhao, Zhigang Zou, Yan Zhou

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Magnetic skyrmions have potential applications in next-generation spintronic devices with ultralow energy consumption. In this work, the current-driven skyrmion motion in a narrow ferromagnetic nanotrack with voltage-controlled magnetic anisotropy (VCMA) is studied numerically. By utilizing the VCMA effect, the transport of skyrmion can be unidirectional in the nanotrack, leading to a one-way information channel. The trajectory of the skyrmion can also be modulated by periodically located VCMA gates, which protects the skyrmion from destruction by touching the track edge. In addition, the location of the skyrmion can be controlled by adjusting the driving pulse length in the presence of the VCMA effect. Our results provide guidelines for practical realization of the skyrmion-based information channel, diode, and skyrmion-based electronic devices such as racetrack memory.

Original languageEnglish
Article number205002
Number of pages9
JournalJournal of Physics D: Applied Physics
Issue number20
Publication statusPublished - 25 Apr 2018

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  • magnetic skyrmions
  • micromagnetics
  • spintronics

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