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Current-driven dynamics and inhibition of the skyrmion Hall effect of ferrimagnetic skyrmions in GdFeCo films

Author

Listed:
  • Seonghoon Woo

    (Korea Institute of Science and Technology)

  • Kyung Mee Song

    (Korea Institute of Science and Technology
    Sookmyung Women’s University)

  • Xichao Zhang

    (The Chinese University of Hong Kong)

  • Yan Zhou

    (The Chinese University of Hong Kong)

  • Motohiko Ezawa

    (University of Tokyo)

  • Xiaoxi Liu

    (Shinshu University)

  • S. Finizio

    (Paul Scherrer Institut)

  • J. Raabe

    (Paul Scherrer Institut)

  • Nyun Jong Lee

    (Division of Scientific Instrumentation, Korea Basic Science Institute)

  • Sang-Il Kim

    (Division of Scientific Instrumentation, Korea Basic Science Institute)

  • Seung-Young Park

    (Division of Scientific Instrumentation, Korea Basic Science Institute)

  • Younghak Kim

    (Pohang University of Science and Technology)

  • Jae-Young Kim

    (Pohang University of Science and Technology)

  • Dongjoon Lee

    (Korea Institute of Science and Technology
    Korea University)

  • OukJae Lee

    (Korea Institute of Science and Technology)

  • Jun Woo Choi

    (Korea Institute of Science and Technology
    Korea University of Science and Technology)

  • Byoung-Chul Min

    (Korea Institute of Science and Technology
    Korea University of Science and Technology)

  • Hyun Cheol Koo

    (Korea Institute of Science and Technology
    Korea University)

  • Joonyeon Chang

    (Korea Institute of Science and Technology
    Korea University of Science and Technology)

Abstract

Magnetic skyrmions are swirling magnetic textures with novel characteristics suitable for future spintronic and topological applications. Recent studies confirmed the room-temperature stabilization of skyrmions in ultrathin ferromagnets. However, such ferromagnetic skyrmions show an undesirable topological effect, the skyrmion Hall effect, which leads to their current-driven motion towards device edges, where skyrmions could easily be annihilated by topographic defects. Recent theoretical studies have predicted enhanced current-driven behavior for antiferromagnetically exchange-coupled skyrmions. Here we present the stabilization of these skyrmions and their current-driven dynamics in ferrimagnetic GdFeCo films. By utilizing element-specific X-ray imaging, we find that the skyrmions in the Gd and FeCo sublayers are antiferromagnetically exchange-coupled. We further confirm that ferrimagnetic skyrmions can move at a velocity of ~50 m s−1 with reduced skyrmion Hall angle, |θSkHE| ~ 20°. Our findings open the door to ferrimagnetic and antiferromagnetic skyrmionics while providing key experimental evidences of recent theoretical studies.

Suggested Citation

  • Seonghoon Woo & Kyung Mee Song & Xichao Zhang & Yan Zhou & Motohiko Ezawa & Xiaoxi Liu & S. Finizio & J. Raabe & Nyun Jong Lee & Sang-Il Kim & Seung-Young Park & Younghak Kim & Jae-Young Kim & Dongjoo, 2018. "Current-driven dynamics and inhibition of the skyrmion Hall effect of ferrimagnetic skyrmions in GdFeCo films," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-03378-7
    DOI: 10.1038/s41467-018-03378-7
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    Citations

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    Cited by:

    1. C. J. O. Reichhardt & C. Reichhardt, 2022. "Dynamic phases and reentrant Hall effect for vortices and skyrmions on periodic pinning arrays," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 95(8), pages 1-16, August.
    2. Takaaki Dohi & Markus Weißenhofer & Nico Kerber & Fabian Kammerbauer & Yuqing Ge & Klaus Raab & Jakub Zázvorka & Maria-Andromachi Syskaki & Aga Shahee & Moritz Ruhwedel & Tobias Böttcher & Philipp Pir, 2023. "Enhanced thermally-activated skyrmion diffusion with tunable effective gyrotropic force," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    3. Sheng Yang & Yuelei Zhao & Kai Wu & Zhiqin Chu & Xiaohong Xu & Xiaoguang Li & Johan Åkerman & Yan Zhou, 2023. "Reversible conversion between skyrmions and skyrmioniums," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    4. Amal Aldarawsheh & Imara Lima Fernandes & Sascha Brinker & Moritz Sallermann & Muayad Abusaa & Stefan Blügel & Samir Lounis, 2022. "Emergence of zero-field non-synthetic single and interchained antiferromagnetic skyrmions in thin films," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    5. Ji-Ho Park & Won Tae Kim & Woonjae Won & Jun-Ho Kang & Soogil Lee & Byong-Guk Park & Byoung S. Ham & Younghun Jo & Fabian Rotermund & Kab-Jin Kim, 2022. "Observation of spin-glass-like characteristics in ferrimagnetic TbCo through energy-level-selective approach," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    6. Roméo Juge & Naveen Sisodia & Joseba Urrestarazu Larrañaga & Qiang Zhang & Van Tuong Pham & Kumari Gaurav Rana & Brice Sarpi & Nicolas Mille & Stefan Stanescu & Rachid Belkhou & Mohamad-Assaad Mawass , 2022. "Skyrmions in synthetic antiferromagnets and their nucleation via electrical current and ultra-fast laser illumination," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    7. Ruyi Chen & Chong Chen & Lei Han & Peisen Liu & Rongxuan Su & Wenxuan Zhu & Yongjian Zhou & Feng Pan & Cheng Song, 2023. "Ordered creation and motion of skyrmions with surface acoustic wave," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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