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Stable skyrmion bundles at room temperature and zero magnetic field in a chiral magnet

Author

Listed:
  • Yongsen Zhang

    (Science Island Branch, Graduate School of USTC
    Chinese Academy of Sciences)

  • Jin Tang

    (Anhui University)

  • Yaodong Wu

    (Hefei Normal University)

  • Meng Shi

    (Science Island Branch, Graduate School of USTC
    Chinese Academy of Sciences)

  • Xitong Xu

    (Chinese Academy of Sciences)

  • Shouguo Wang

    (Anhui University)

  • Mingliang Tian

    (Chinese Academy of Sciences
    Anhui University)

  • Haifeng Du

    (Chinese Academy of Sciences)

Abstract

Topological spin textures are characterized by magnetic topological charges, Q, which govern their electromagnetic properties. Recent studies have achieved skyrmion bundles with arbitrary integer values of Q, opening possibilities for exploring topological spintronics based on Q. However, the realization of stable skyrmion bundles in chiral magnets at room temperature and zero magnetic field — the prerequisite for realistic device applications — has remained elusive. Here, through the combination of pulsed currents and reversed magnetic fields, we experimentally achieve skyrmion bundles with different integer Q values — reaching a maximum of 24 at above room temperature and zero magnetic field — in the chiral magnet Co8Zn10Mn2. We demonstrate the field-driven annihilation of high-Q bundles and present a phase diagram as a function of temperature and field. Our experimental findings are consistently corroborated by micromagnetic simulations, which reveal the nature of the skyrmion bundle as that of skyrmion tubes encircled by a fractional Hopfion.

Suggested Citation

  • Yongsen Zhang & Jin Tang & Yaodong Wu & Meng Shi & Xitong Xu & Shouguo Wang & Mingliang Tian & Haifeng Du, 2024. "Stable skyrmion bundles at room temperature and zero magnetic field in a chiral magnet," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-47730-6
    DOI: 10.1038/s41467-024-47730-6
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    References listed on IDEAS

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    1. X. Z. Yu & Y. Onose & N. Kanazawa & J. H. Park & J. H. Han & Y. Matsui & N. Nagaosa & Y. Tokura, 2010. "Real-space observation of a two-dimensional skyrmion crystal," Nature, Nature, vol. 465(7300), pages 901-904, June.
    2. Wataru Koshibae & Naoto Nagaosa, 2014. "Creation of skyrmions and antiskyrmions by local heating," Nature Communications, Nature, vol. 5(1), pages 1-11, December.
    3. Weiwei Wang & Dongsheng Song & Wensen Wei & Pengfei Nan & Shilei Zhang & Binghui Ge & Mingliang Tian & Jiadong Zang & Haifeng Du, 2022. "Electrical manipulation of skyrmions in a chiral magnet," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
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