The effect of chemical disorder on the magnetic anisotropy of strained Fe-Co films

Abstract

Strained Fe-Co films have recently been demonstrated to exhibit a large magnetocrystalline anisotropy (MCA) and thus to be of potential interest as magnetic storage material. Here, we show by means of density-functional (DF) calculations, that chemical order can remarkably enhance the MCA. We also investigate the effect of relaxation perpendicular to the applied strain and evaluate the strain energy as a function of Co concentration and substrate lattice parameter. On this basis, favourable preparation routes for films with a large perpendicular anisotropy are suggested.

- 7 pages, 7 figures - the paper is intended for a special issue on the occasion of M. Faehnles 60th birthday

References in corpus (2)

• Strained tetragonal states and Bain paths in metals
• Tuning of crystal structure and magnetic properties by exceptionally large epitaxial strains

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