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Topological transformation of synthetic ferromagnetic skyrmions: thermal assisted switching of helicity by spin-orbit torque

Author

Listed:
  • Kai Wu

    (The Chinese University of Hong Kong, Shenzhen)

  • Yuelei Zhao

    (The Chinese University of Hong Kong, Shenzhen)

  • Hongyuan Hao

    (Lanzhou University)

  • Sheng Yang

    (The Chinese University of Hong Kong, Shenzhen)

  • Shuang Li

    (The Chinese University of Hong Kong, Shenzhen)

  • Qingfang Liu

    (Lanzhou University)

  • Senfu Zhang

    (Lanzhou University
    King Abdullah University of Science and Technology)

  • Xixiang Zhang

    (King Abdullah University of Science and Technology)

  • Johan Åkerman

    (University of Gothenburg
    Tohoku University
    Tohoku University)

  • Li Xi

    (Lanzhou University)

  • Ying Zhang

    (Chinese Academy of Sciences)

  • Kaiming Cai

    (Huazhong University of Science and Technology)

  • Yan Zhou

    (The Chinese University of Hong Kong, Shenzhen)

Abstract

This study demonstrates the controllable switching of skyrmion helicity using spin-orbit torque, enhanced by thermal effects. Electric current pulses applied to a [Pt/Co]3/Ru/[Co/Pt]3 multilayer stripe drive skyrmions in a direction opposite to the current flow. Continuous pulsing results in an unexpected reversal of skyrmion motion. Micromagnetic simulations reveal that skyrmions in the upper and lower ferromagnetic layers exhibit distinct helicities, forming a hybrid synthetic skyrmion. The helicity switch of this hybrid structure accounts for the motion reversal. This study introduces innovative helicity control methods, advancing spintronic device applications, including data storage and quantum computing based on skyrmion helicity.

Suggested Citation

  • Kai Wu & Yuelei Zhao & Hongyuan Hao & Sheng Yang & Shuang Li & Qingfang Liu & Senfu Zhang & Xixiang Zhang & Johan Åkerman & Li Xi & Ying Zhang & Kaiming Cai & Yan Zhou, 2024. "Topological transformation of synthetic ferromagnetic skyrmions: thermal assisted switching of helicity by spin-orbit torque," Nature Communications, Nature, vol. 15(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-54851-5
    DOI: 10.1038/s41467-024-54851-5
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    References listed on IDEAS

    as
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