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    Isotropic Spin Hall Effect in an Epitaxial Ferromagnet

    Nozomi Soya1, Michihiro Yamada2,3, Kohei Hamaya2,4, and Kazuya Ando1,5,6,*

    • 1Department of Applied Physics and Physico-Informatics, Keio University, Yokohama 223-8522, Japan
    • 2Center for Spintronics Research Network, Osaka University, 1-3 Machikaneyama, Toyonaka 560-8531, Japan
    • 3PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
    • 4Spintronics Research Network Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
    • 5Keio Institute of Pure and Applied Sciences, Keio University, Yokohama 223-8522, Japan
    • 6Center for Spintronics Research Network, Keio University, Yokohama 223-8522, Japan

    • *ando@appi.keio.ac.jp
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    Phys. Rev. Lett. 131, 076702 – Published 17 August, 2023

    DOI: https://doi.org/10.1103/PhysRevLett.131.076702

    Abstract

    We report the observation of the isotropic spin Hall effect in a ferromagnet. We show that the spin Hall effect in an epitaxially grown Fe3Si generates a sizable spin current with a spin direction that is noncollinear with the magnetization. Furthermore, we find that the spin Hall current is independent of the relative orientation between its spin direction and the magnetization; the spin Hall effect is isotropic. This observation demonstrates that the intrinsically generated transverse spin component is protected from dephasing, providing fundamental insights into the generation and transport of spin currents in ferromagnets.

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    Phys. Rev. Lett. 131, 076702– Published 17 August, 2023
    • Received 16 January 2023
    • Revised 2 May 2023
    • Accepted 22 June 2023
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