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Magnetic bilayer-skyrmions without skyrmion Hall effect

Author

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  • Xichao Zhang

    (School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University
    University of Hong Kong)

  • Yan Zhou

    (School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University
    University of Hong Kong)

  • Motohiko Ezawa

    (University of Tokyo)

Abstract

Magnetic skyrmions might be used as information carriers in future advanced memories, logic gates and computing devices. However, there exists an obstacle known as the skyrmion Hall effect (SkHE), that is, the skyrmion trajectories bend away from the driving current direction due to the Magnus force. Consequently, the skyrmions in constricted geometries may be destroyed by touching the sample edges. Here we theoretically propose that the SkHE can be suppressed in the antiferromagnetically exchange-coupled bilayer system, since the Magnus forces in the top and bottom layers are exactly cancelled. We show that such a pair of SkHE-free magnetic skyrmions can be nucleated and be driven by the current-induced torque. Our proposal provides a promising means to move magnetic skyrmions in a perfectly straight trajectory in ultra-dense devices with ultra-fast processing speed.

Suggested Citation

  • Xichao Zhang & Yan Zhou & Motohiko Ezawa, 2016. "Magnetic bilayer-skyrmions without skyrmion Hall effect," Nature Communications, Nature, vol. 7(1), pages 1-7, April.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms10293
    DOI: 10.1038/ncomms10293
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    Cited by:

    1. 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.
    2. Mona Bhukta & Takaaki Dohi & Venkata Krishna Bharadwaj & Ricardo Zarzuela & Maria-Andromachi Syskaki & Michael Foerster & Miguel Angel Niño & Jairo Sinova & Robert Frömter & Mathias Kläui, 2024. "Homochiral antiferromagnetic merons, antimerons and bimerons realized in synthetic antiferromagnets," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    3. Anthony K. C. Tan & Pin Ho & James Lourembam & Lisen Huang & Hang Khume Tan & Cynthia J. O. Reichhardt & Charles Reichhardt & Anjan Soumyanarayanan, 2021. "Visualizing the strongly reshaped skyrmion Hall effect in multilayer wire devices," Nature Communications, Nature, vol. 12(1), pages 1-8, December.

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