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Skyrmion pinning energetics in thin film systems

Author

Listed:
  • Raphael Gruber

    (Johannes Gutenberg-Universität Mainz)

  • Jakub Zázvorka

    (Faculty of Mathematics and Physics, Charles University)

  • Maarten A. Brems

    (Johannes Gutenberg-Universität Mainz)

  • Davi R. Rodrigues

    (Johannes Gutenberg-Universität Mainz
    Dipartimento di Ingegneria Elettrica e dell’Informazione, Politecnico di Bari
    University of Duisburg-Essen)

  • Takaaki Dohi

    (Johannes Gutenberg-Universität Mainz)

  • Nico Kerber

    (Johannes Gutenberg-Universität Mainz)

  • Boris Seng

    (Johannes Gutenberg-Universität Mainz
    Institut Jean Lamour, UMR CNRS 7198, Université de Lorraine)

  • Mehran Vafaee

    (Johannes Gutenberg-Universität Mainz
    Singulus Technologies AG)

  • Karin Everschor-Sitte

    (Johannes Gutenberg-Universität Mainz
    University of Duisburg-Essen
    University of Duisburg-Essen)

  • Peter Virnau

    (Johannes Gutenberg-Universität Mainz)

  • Mathias Kläui

    (Johannes Gutenberg-Universität Mainz)

Abstract

A key issue for skyrmion dynamics and devices are pinning effects present in real systems. While posing a challenge for the realization of conventional skyrmionics devices, exploiting pinning effects can enable non-conventional computing approaches if the details of the pinning in real samples are quantified and understood. We demonstrate that using thermal skyrmion dynamics, we can characterize the pinning of a sample and we ascertain the spatially resolved energy landscape. To understand the mechanism of the pinning, we probe the strong skyrmion size and shape dependence of the pinning. Magnetic microscopy imaging demonstrates that in contrast to findings in previous investigations, for large skyrmions the pinning originates at the skyrmion boundary and not at its core. The boundary pinning is strongly influenced by the very complex pinning energy landscape that goes beyond the conventional effective rigid quasi-particle description. This gives rise to complex skyrmion shape distortions and allows for dynamic switching of pinning sites and flexible tuning of the pinning.

Suggested Citation

  • Raphael Gruber & Jakub Zázvorka & Maarten A. Brems & Davi R. Rodrigues & Takaaki Dohi & Nico Kerber & Boris Seng & Mehran Vafaee & Karin Everschor-Sitte & Peter Virnau & Mathias Kläui, 2022. "Skyrmion pinning energetics in thin film systems," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
  • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-30743-4
    DOI: 10.1038/s41467-022-30743-4
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    2. Klaus Raab & Maarten A. Brems & Grischa Beneke & Takaaki Dohi & Jan Rothörl & Fabian Kammerbauer & Johan H. Mentink & Mathias Kläui, 2022. "Brownian reservoir computing realized using geometrically confined skyrmion dynamics," Nature Communications, Nature, vol. 13(1), pages 1-6, December.
    3. Peter Meisenheimer & Hongrui Zhang & David Raftrey & Xiang Chen & Yu-Tsun Shao & Ying-Ting Chan & Reed Yalisove & Rui Chen & Jie Yao & Mary C. Scott & Weida Wu & David A. Muller & Peter Fischer & Robe, 2023. "Ordering of room-temperature magnetic skyrmions in a polar van der Waals magnet," Nature Communications, Nature, vol. 14(1), pages 1-9, December.

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