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

✍ Scribed by C. Neise; S. Schönecker; M. Richter; K. Koepernik; H. Eschrig

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
499 KB
Volume
248
Category
Article
ISSN
0370-1972

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✦ Synopsis

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.

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## Abstract We have grown by molecular beam epitaxy (MBE) 300 Å Fe films on single crystal MgO(001) substrates with Ag buffer layer with a thickness varying from 0 to 150 Å. The epitaxial growth and structure quality of the films were verified by reflection high‐energy electron diffraction (RHEED)