Theoretical predictions for magnetic interface anisotropy
1993; IEEE Magnetics Society; Volume: 29; Issue: 6 Linguagem: Inglês
10.1109/20.281110
ISSN1941-0069
AutoresJ. M. MacLaren, R. H. Victora,
Tópico(s)Magnetic Properties of Alloys
ResumoElectronic structure calculations are used to predict the magnetic anisotropy of Co/Pd, Co/Pt, Co/Cu, Fe/Pt, and Fe/Ag superlattices. In the case of Co/Pd and Co/Pt, the magnetic anisotropy is analyzed as a deconvolution of volume and interface contributions. The experimental result of an orientation-independent interface anisotropy of 0.63+or-0.05 ergs/cm/sup 2/ for Co/Pd superlattices is also predicted by theory. The theoretical interface anisotropy is found to be 0.62+or-0.06 ergs/cm/sup 2/, in close agreement with the experiment. This result is not universally observed, and, based upon calculations for strained and unstrained superlattices, appears to be a consequence of the degree of strain found in the Co/Pd system. A symmetry derived model based upon summing L(M.R)/sup 2/ pair interactions accurately reproduces the observed anisotropy and the dependence upon atomic constituents, strain and growth direction. >
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