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arXiv · 1304.1353

Effect of stacking faults on the magnetocrystalline anisotropy of hcp Co: a first-principles study

C J Aas·L Szunyogh·R F L Evans·R W Chantrell
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Abstract

In terms of the fully relativistic screened Korringa-Kohn-Rostoker method we investigate the effect of stacking faults on the magnetic properties of hexagonal close-packed cobalt. In particular, we consider the formation energy and the effect on the magnetocrystalline anisotropy energy (MAE) of four different stacking faults in hcp cobalt -- an intrinsic growth fault, an intrinsic deformation fault, an extrinsic fault and a twin-like fault. We find that the intrinsic growth fault has the lowest formation energy, in good agreement with previous first-principles calculations. With the exception of the intrinsic deformation fault which has a positive impact on the MAE, we find that the presence of a stacking fault generally reduces the MAE of bulk Co. Finally, we consider a pair of intrinsic growth faults and find that their effect on the MAE is not additive, but synergic.

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C J Aas, L Szunyogh, R F L Evans, R W Chantrell. 2013-04-04. Effect of stacking faults on the magnetocrystalline anisotropy of hcp Co: a first-principles study. https://arxiv.org/abs/1304.1353

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