Origin of strong magnetic anisotropy in L10-FeNi probed by angular-dependent magnetic circular dichroism

Masato Kotsugi, Masaki Mizuguchi, Shigeki Sekiya, Masaichiro Mizumaki, Takayuki Kojima, Tetsuya Nakamura, Hitoshi Osawa, Kenji Kodama, Takumi Ohtsuki, Takuo Ohkochi, Koki Takanashi, Yoshio Watanabe

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


We investigated the origin of strong magnetic anisotropy energy (MAE) in L10-type ordered FeNi phase by angular-dependent magnetic circular dichroism. Our findings showed that the orbital magnetic moment of Fe has a significant angular dependence that exhibits a maximum value at the [001] direction corresponding perpendicular to the plane. The calculated uniaxial anisotropy energy when considering spin-orbit (SO) interaction shows quantitatively good agreement with the volume MAE. We concluded that the orbital anisotropy in 3d Fe electrons results in the strong MAE in L10-FeNi and ascribe this to the spin-orbit interaction via structural ordering.

Original languageEnglish
Pages (from-to)235-239
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Publication statusPublished - 2013 Jan


  • Iron meteorite
  • L1-FeNi
  • Magnetic anisotropy
  • Magnetic circular dichroism
  • Spin-orbit interaction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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