Isotropic Spin Hall Effect in an Epitaxial Ferromagnet

Nozomi Soya; Michihiro Yamada; Kohei Hamaya; Kazuya Ando

doi:10.1103/PhysRevLett.131.076702

Isotropic Spin Hall Effect in an Epitaxial Ferromagnet

Phys Rev Lett. 2023 Aug 18;131(7):076702. doi: 10.1103/PhysRevLett.131.076702.

Authors

Nozomi Soya¹, Michihiro Yamada^{2

3}, Kohei Hamaya^{2

4}, Kazuya Ando^{1

5

6}

Affiliations

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

PMID: 37656863
DOI: 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 Fe_{3}Si 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.