Chiral Magnetic Texture and Spin Dynamics in Magnetic Superlattices

POSTER

Abstract

Chiral magnetic textures, in particular magnetic skyrmions, are attractive for data storage and processing via magnetic “racetracks” and logic gates. These textures may also be used as neurotransmitters in artificial neural networks for non-conventional computing. For such applications, thin-film, all-metallic magnetic heterostructures with chiral texture stabilized by interfacial Dzyaloshinskii-Moriya interaction (iDMI) are ideal candidates.
Here, we investigate magnetic superlattices based on the low-damping and high saturation magnetization binary alloy Co25Fe75 (CoFe) [1,2]. The formation of circular magnetic texture is confirmed by magnetic force microscopy. This texture has a stable sub-100 nm diameter in a field range of about 140 mT, indicating the formation of iDMI-stabilized magnetic skyrmions. The relatively low damping of the superlattice spin dynamics is confirmed by broadband ferromagnetic resonance measurements.

[1] M. A. W. Schoen, Nat. Phys 12, 839 (2016).
[2] L. Flacke, Appl. Phys. Lett. 115, 122402 (2019).

*Financial support by Deutsche Forschungsgemeinschaft via projects WE5386/4-1 and WE5386/5-1 is gratefully acknowledged.

Presenters

  • Luis Flacke

    • Walther Meißner Institut

Authors

  • Luis Flacke

    • Walther Meißner Institut

  • Valentin Ahrens

    • Chair of Nanoelectronics, Technical University of Munich

  • Simon Mendisch

    • Chair of Nanoelectronics, Technical University of Munich

  • Lukas Körber

    • Helmholtz-Zentrum Dresden-Rossendorf

  • Attila Kákay

    • Helmholtz-Zentrum Dresden-Rossendorf

  • Elisabeth Meidinger

    • Walther Meißner Institut

  • Misbah Yaqoob

    • Walther Meißner Institut

  • Markus Becherer

    • Chair of Nanoelectronics, Technical University of Munich

  • Lukas Liensberger

    • Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
    • Walther Meißner Institut

  • Matthias Althammer

    • Walther Meißner Institut

  • Hans Huebl

    • Walther Meißner Institut

  • Stephan Geprägs

    • Walther-Meißner-Institut, Bavarian Academy of Sciences and Humanities, Garching, Germany
    • Walther Meißner Institut

  • Rudolf Gross

    • Walther-Meißner-Institut, Bavarian Academy of Sciences and Humanities
    • Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
    • Walther-Meißner-Institut, Bavarian Academy of Sciences and Humanities, Garching, Germany
    • Walther Meißner Institut
    • Walther-Meißner-Institute, Bavarian Academy of Sciences and Humanities & Physik-Department, Technische Universität München, Germany

  • Mathias Weiler

    • Walther Meißner Institut