Effects of composition and chemical disorder on the magnetocrystalline anisotropy of FexPt1-x alloys

C. J. Aas, L. Szunyogh, R. W. Chantrell

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8 Citations (Scopus)

Abstract

We perform first-principles calculations of the magnetocrystalline anisotropy energy (MAE) of the L10-like FexPt 1-x samples studied experimentally by Barmak and co-workers (see J. Appl. Phys., 98 (2005) 033904). The variation of composition and long-range chemical order in the samples was studied in terms of the coherent potential approximation. In accordance with experimental observations, we find that, in the presence of long-range chemical disorder, Fe-rich samples exhibit a larger MAE than stoichiometric FePt. By considering the site-and species-resolved contributions to the MAE, we infer that the MAE is primarily a function of the degree of completeness of the nominal Fe layers in the L10 FePt structure.

Original languageEnglish
Article number57004
JournalEPL
Volume102
Issue number5
DOIs
Publication statusPublished - Jun 1 2013

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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