Spin-orbit coupling effect in (Ga,Mn)As films: anisotropic exchange interactions and magnetocrystalline anisotropy

Abstract

The magneto-crystalline anisotropy (MCA) of (Ga,Mn)As films has been studied on the basis of ab-initio electronic structure theory by performing magnetic torque calculations. An appreciable contribution to the in-plane uniaxial anisotropy can be attributed to an extended region adjacent to the surface. Calculations of the exchange tensor allow to ascribe a significant part to the MCA to the exchange anisotropy, caused either by a tetragonal distortion of the lattice or by the presence of the surface or interface.

5 pages, 3 figures

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• Angular momentum transfer via relativistic spin-lattice coupling from first principles
• Spin-lattice interaction parameters from first principles: theory and implementation
• Spin-lattice couplings in $3d$ ferromagnets: analysis from first-principles
• The effects of V doping on the intrinsic properties of SmFe10Co2 alloys: a theoretical investigation