The effect of coherent uniaxial anisotropies on the grain-size dependence of coercivity in nanocrystalline soft magnetic alloys

K. Suzuki, G. Herzer, J. M. Cadogan

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Abstract

The grain-size (D) dependence of coercivity (Hc) in various nanocrystalline soft magnetic materials has been reanalyzed with particular attention to induced uniaxial anisotropies. In addition to the well-known D6 law, a D3 dependence of Hc is observed for some nanocrystalline samples with uniaxial anisotropies larger than the random magnetocrystalline anisotropy (〈K1〉). The original random anisotropy model has been extended to the case where the macroscopic uniaxial anisotropies dominate over 〈K1〉. As a result, the extended model predicts a D3 dependence of Hc and explains the observed grain-size dependence quite well.

Original languageEnglish
Pages (from-to)949-950
Number of pages2
JournalJournal of Magnetism and Magnetic Materials
Volume177-181
Issue numberPART 2
DOIs
Publication statusPublished - 1 Jan 1998
Externally publishedYes

Keywords

  • Anisotropy - induced
  • Anisotropy - random
  • Nanocrystalline alloys

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