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

By Carsten Neise, Stephan Schönecker, Manuel Richter, Klaus Koepernik and Helmut Eschrig

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

Topics: Condensed Matter - Materials Science, 00A79
Year: 2011
DOI identifier: 10.1002/pssb.201147100
OAI identifier: oai:arXiv.org:1103.5303
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