Finite-temperature anisotropy of magnetic alloys

R. Skomski, O. N. Mryasov, J. Zhou, D. J. Sellmyer

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


The temperature dependence of the magnetic anisotropy of ferromagnetic materials is analyzed. Simple ferromagnets, such as Fe and Co, obey the m=n (n+1) 2 power laws predicted by the Callen and Callen [Phys. Rev. 129, 578 (1963)] theory, but in alloys, the applicability of the theory is an exception rather than the rule. Many alloys, such as the rare-earth transition-metal intermetallics and L 10 magnets, violate a basic assumption of the theory, namely, that the single-ion anisotropy and the spontaneous magnetization have the same origin. This is the reason for significant deviations from the Callen and Callen behavior, such as the m=2 law we obtained for L 10 alloys.

Original languageEnglish (US)
Article number08E916
JournalJournal of Applied Physics
Issue number8
StatePublished - 2006
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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