Temperature dependent magnetic anisotropy in metallic magnets from an Ab initio electronic structure theory: L10-ordered FePt

J. B. Staunton, S. Ostanin, S. S.A. Razee, B. L. Gyorffy, L. Szunyogh, B. Ginatempo, Ezio Bruno

Research output: Contribution to journalArticle

128 Citations (Scopus)

Abstract

The variation of magnetic anisotropy K with magnetization M in metallic ferromagnets was investigated using relativistic electronic structure theory of finite temperature metallic magnetism. This theory was applied to the high uniaxial K material, L10-ordered FePt, and its magnetic easy axis perpendicular to the Fe/Pt layers for all M and K to be proportional to M 2 for a broad range of values of M was also found. The results show that at low temperatures in the single-ion model, the magnetocrystalline anisotropy (MCA) falls off much more quickly as the temperature is increased and the overall magnetization is reduced.

Original languageEnglish
Article number257204
JournalPhysical review letters
Volume93
Issue number25
DOIs
Publication statusPublished - Dec 17 2004

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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