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arXiv · 1108.5870

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

S. Mankovsky·S. Polesya·S. Bornemann·J. Minár·F. Hoffmann·C. H. Back·H. Ebert
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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.

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S. Mankovsky, S. Polesya, S. Bornemann, J. Minár, F. Hoffmann, C. H. Back, H. Ebert. 2011-08-30. Spin-orbit coupling effect in (Ga,Mn)As films: anisotropic exchange interactions and magnetocrystalline anisotropy. https://doi.org/10.1103/physrevb.84.201201

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