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説明:

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.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Density of states, Fermi surface, Magnetotransport, Spin-orbit coupling, Spintronics

刊行年月日: 2021-10-29

出版者: American Institute of Physics

掲載誌:

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

研究助成金:

• 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))

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1103/PhysRevMaterials.5.L101402

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更新時刻: 2024-01-05 22:13:50 +0900

MDRでの公開時刻: 2023-05-10 11:05:58 +0900