Journal
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Volume 248, Issue 10, Pages 2398-2403Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.201147100
Keywords
chemical disorder; Fe-Co alloys; magnetic anisotropy; perpendicular recording; strained films
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Funding
- DFG [RI932/6-1]
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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. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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