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The spin anomalous Hall effect (SAHE) in ferromagnetic metals, which can generate a spin-orbit torque to rotate the magnetization of another ferromagnetic layer through a nonmagnetic spacer in magnetic junctions, has attracted much attention.We theoretically investigated the spin anomalous Hall conductivity (SAHC) of the L10-type alloys XPt (X = Fe, Co, Ni) on the basis of first-principles density functional theory and linear response theory. We found that the SAHC of FePt is much smaller than the anomalous Hall conductivity (AHC), leading to very small polarization for the anomalous Hall effect ζ = SAHC/AHC of around 0.1. On the other hand, the SAHC increases with an increasing number of valence electrons (Nv), and CoPt and NiPt show relatively large values of |ζ |, greater than 1. The negative contribution of the spin-down-down component of AHC is the origin of the large SAHC and ζ in CoPt and NiPt, which is due to the antibonding states of Pt around the Fermi level in the minority-spin states.

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• Creative Commons BY Attribution 4.0 International
  

Keyword: Density of states, Fermi surface, Magnetotransport, Spin-orbit coupling, Spintronics

Date published: 2021-10-29

Publisher: American Institute of Physics

Journal:

• Physical Review Materials (ISSN: 24759953) vol. 5 p. 1-5 L101402

Funding:

• 日本学術振興会(JSPS) JP16H06332, JP20H00299, JP20H02190 (基盤研究(S), 基盤研究(A), 基盤研究(B))

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1103/PhysRevMaterials.5.L101402

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Updated at: 2024-01-05 22:13:50 +0900

Published on MDR: 2023-05-10 11:05:58 +0900