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Dynamic transition of current-driven single-skyrmion motion in a room-temperature chiral-lattice magnet

Author

Listed:
  • Licong Peng

    (RIKEN Center for Emergent Matter Science (CEMS))

  • Kosuke Karube

    (RIKEN Center for Emergent Matter Science (CEMS))

  • Yasujiro Taguchi

    (RIKEN Center for Emergent Matter Science (CEMS))

  • Naoto Nagaosa

    (RIKEN Center for Emergent Matter Science (CEMS)
    University of Tokyo)

  • Yoshinori Tokura

    (RIKEN Center for Emergent Matter Science (CEMS)
    University of Tokyo
    University of Tokyo)

  • Xiuzhen Yu

    (RIKEN Center for Emergent Matter Science (CEMS))

Abstract

Driving and controlling single-skyrmion motion promises skyrmion-based spintronic applications. Recently progress has been made in moving skyrmionic bubbles in thin-film heterostructures and low-temperature chiral skyrmions in the FeGe helimagnet by electric current. Here, we report the motion tracking and control of a single skyrmion at room temperature in the chiral-lattice magnet Co9Zn9Mn2 using nanosecond current pulses. We have directly observed that the skyrmion Hall motion reverses its direction upon the reversal of skyrmion topological number using Lorentz transmission electron microscopy. Systematic measurements of the single-skyrmion trace as a function of electric current reveal a dynamic transition from the static pinned state to the linear flow motion via a creep event, in agreement with the theoretical prediction. We have clarified the role of skyrmion pinning and evaluated the intrinsic skyrmion Hall angle and the skyrmion velocity in the course of the dynamic transition. Our results pave a way to skyrmion applications in spintronic devices.

Suggested Citation

  • Licong Peng & Kosuke Karube & Yasujiro Taguchi & Naoto Nagaosa & Yoshinori Tokura & Xiuzhen Yu, 2021. "Dynamic transition of current-driven single-skyrmion motion in a room-temperature chiral-lattice magnet," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-27073-2
    DOI: 10.1038/s41467-021-27073-2
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    References listed on IDEAS

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    1. Y. Tokunaga & X. Z. Yu & J. S. White & H. M. Rønnow & D. Morikawa & Y. Taguchi & Y. Tokura, 2015. "A new class of chiral materials hosting magnetic skyrmions beyond room temperature," Nature Communications, Nature, vol. 6(1), pages 1-7, November.
    2. Junichi Iwasaki & Masahito Mochizuki & Naoto Nagaosa, 2013. "Universal current-velocity relation of skyrmion motion in chiral magnets," Nature Communications, Nature, vol. 4(1), pages 1-8, June.
    3. Seonghoon Woo & Kyung Mee Song & Hee-Sung Han & Min-Seung Jung & Mi-Young Im & Ki-Suk Lee & Kun Soo Song & Peter Fischer & Jung-Il Hong & Jun Woo Choi & Byoung-Chul Min & Hyun Cheol Koo & Joonyeon Cha, 2017. "Spin-orbit torque-driven skyrmion dynamics revealed by time-resolved X-ray microscopy," Nature Communications, Nature, vol. 8(1), pages 1-8, August.
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    1. M. T. Birch & D. Cortés-Ortuño & K. Litzius & S. Wintz & F. Schulz & M. Weigand & A. Štefančič & D. A. Mayoh & G. Balakrishnan & P. D. Hatton & G. Schütz, 2022. "Toggle-like current-induced Bloch point dynamics of 3D skyrmion strings in a room temperature nanowire," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Yao Guang & Xichao Zhang & Yizhou Liu & Licong Peng & Fehmi Sami Yasin & Kosuke Karube & Daisuke Nakamura & Naoto Nagaosa & Yasujiro Taguchi & Masahito Mochizuki & Yoshinori Tokura & Xiuzhen Yu, 2024. "Confined antiskyrmion motion driven by electric current excitations," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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