Determining perpendicular magnetic anisotropy in Fe/MgO/Fe magnetic tunnel junction: A DFT-based spin-orbit torque method

被引：2

作者：

Huang, Bao-Huei ^{[1
]}

Fu, Yu-Hsiang ^{[2
,3
]}

Kaun, Chao-Cheng ^{[3
]}

Tang, Yu-Hui ^{[1
]}

机构：

[1] Natl Cent Univ, Dept Phys, Taoyuan 32001, Taiwan

[2] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan

[3] Acad Sinica, Res Ctr Appl Sci, Taipei 11529, Taiwan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2023年 / 585卷

关键词：

First-principles calculations; Spin-transfer torque; Spin-orbit torque; Magnetic anisotropy; ENERGY; APPROXIMATION;

D O I：

10.1016/j.jmmm.2023.171098

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In our JunPy package, we have combined the first-principles calculated self-consistent Hamiltonian with divide -and-conquer technique to successfully determine the magnetic anisotropy (MA) in an Fe/MgO/Fe magnetic tunnel junction (MTJ). We propose a comprehensive analytical derivation to clarify the crucial roles of spin- orbit coupling that mediates the exchange and spin-orbit components of spin torque, and the kinetic and spin-orbit components of spin current accumulation. The angular dependence of cumulative spin-orbit torque (SOT) indicates a uniaxial MA corresponding to the out-of-plane rotations of magnetic moments of the free Fe layers. Different from the conventional MA energy calculation and the phenomenological theory for a whole MTJ, our results provide insight into the orbital-resolved SOT for atomistic spin dynamics simulation in emergency complex magnetic heterojunctions.

引用

页数：10

共 56 条

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