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Enhanced thermally-activated skyrmion diffusion with tunable effective gyrotropic force

Author

Listed:
  • Takaaki Dohi

    (Institut für Physik, Johannes Gutenberg-Universität Mainz
    Tohoku University)

  • Markus Weißenhofer

    (Universität Konstanz
    Uppsala University
    Freie Universität Berlin)

  • Nico Kerber

    (Institut für Physik, Johannes Gutenberg-Universität Mainz
    Graduate School of Excellence Materials Science in Mainz)

  • Fabian Kammerbauer

    (Institut für Physik, Johannes Gutenberg-Universität Mainz)

  • Yuqing Ge

    (Institut für Physik, Johannes Gutenberg-Universität Mainz)

  • Klaus Raab

    (Institut für Physik, Johannes Gutenberg-Universität Mainz)

  • Jakub Zázvorka

    (Charles University)

  • Maria-Andromachi Syskaki

    (Institut für Physik, Johannes Gutenberg-Universität Mainz
    Singulus Technologies AG)

  • Aga Shahee

    (Institut für Physik, Johannes Gutenberg-Universität Mainz)

  • Moritz Ruhwedel

    (Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern)

  • Tobias Böttcher

    (Graduate School of Excellence Materials Science in Mainz
    Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern)

  • Philipp Pirro

    (Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern)

  • Gerhard Jakob

    (Institut für Physik, Johannes Gutenberg-Universität Mainz
    Graduate School of Excellence Materials Science in Mainz)

  • Ulrich Nowak

    (Universität Konstanz)

  • Mathias Kläui

    (Institut für Physik, Johannes Gutenberg-Universität Mainz
    Graduate School of Excellence Materials Science in Mainz)

Abstract

Magnetic skyrmions, topologically-stabilized spin textures that emerge in magnetic systems, have garnered considerable interest due to a variety of electromagnetic responses that are governed by the topology. The topology that creates a microscopic gyrotropic force also causes detrimental effects, such as the skyrmion Hall effect, which is a well-studied phenomenon highlighting the influence of topology on the deterministic dynamics and drift motion. Furthermore, the gyrotropic force is anticipated to have a substantial impact on stochastic diffusive motion; however, the predicted repercussions have yet to be demonstrated, even qualitatively. Here we demonstrate enhanced thermally-activated diffusive motion of skyrmions in a specifically designed synthetic antiferromagnet. Suppressing the effective gyrotropic force by tuning the angular momentum compensation leads to a more than 10 times enhanced diffusion coefficient compared to that of ferromagnetic skyrmions. Consequently, our findings not only demonstrate the gyro-force dependence of the diffusion coefficient but also enable ultimately energy-efficient unconventional stochastic computing.

Suggested Citation

  • 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.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-40720-0
    DOI: 10.1038/s41467-023-40720-0
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    1. 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.

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