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Persistent excitation of spin waves for kπ-state skyrmions

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Abstract

In this study, we investigated the micromagnetic dynamics of kπ-state skyrmions in a magnetic nanodot under a circular spin-polarized current and found an excited spin wave that can propagate persistently along the direction of the radius toward the center. This dynamic process is associated with two energetically favorable states in an oscillating period of spin waves. In this case, the spin-polarized current plays a role similar to effective perpendicular magnetic anisotropy and decreases the minimum energy in the magnetic system. Our findings provide insight into understanding the dynamic behaviors of topological magnetic textures.

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Authors and Affiliations

  1. Key Laboratory for Anisotropy and Texture of Materials (MOE), School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, China

    RongZhi Zhao, ChengLong Hu, LianZe Ji & XueFeng Zhang

  2. Institute of Advanced Magnetic Materials, Hangzhou Dianzi University, Hangzhou, 310012, China

    RongZhi Zhao, ChengLong Hu, LianZe Ji, WenChao Chen & XueFeng Zhang

Authors
  1. RongZhi Zhao
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  2. ChengLong Hu
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  3. LianZe Ji
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  5. XueFeng Zhang
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Correspondence to XueFeng Zhang.

Additional information

This work was supported by the Zhejiang Provincial Natural Science Foundation of China (Grant No. LR18E010001), the National Natural Science Foundation of China (Grant Nos. U1704253, and 51471045), and the Fundamental Research Funds for the Central Universities (Grant No. N160208001)

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Zhao, R., Hu, C., Ji, L. et al. Persistent excitation of spin waves for kπ-state skyrmions. Sci. China Phys. Mech. Astron. 63, 267511 (2020). https://doi.org/10.1007/s11433-020-1529-0

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