Structural, magnetic and electronic state characterization of L1 0 -type ordered FeNi alloy extracted from a natural meteorite

M. Kotsugi, H. Maruyama, N. Ishimatsu, N. Kawamura, M. Suzuki, M. Mizumaki, K. Osaka, T. Matsumoto, T. Ohkochi, T. Ohtsuki, Takayuki Kojima, Masaki Mizuguchi, Koki Takanashi, Y. Watanabe

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32 Citations (Scopus)


To understand the hard magnetism of L1 0 -type ordered FeNi alloy, we extracted the L1 0 -FeNi phase from a natural meteorite, and evaluated its fundamental solid-state properties: sample composition, magnetic hysteresis, crystal structure and electronic structure. We executed multidirectional analyses using scanning electron microscopy with an electron probe micro-analyzer (SEM-EPMA), a superconducting quantum interference device (SQUID), x-ray diffraction (XRD) and magnetic circular dichroism (MCD). As a result, we found that the composition was Fe: 50.47 ± 1.98 at.%, Ni: 49.60 ± 1.49 at.%, and an obvious superlattice peak is confirmed. The estimated degree of order was 0.608, with lattice constants a = b = 3.582 Å and c = 3.607 Å. The obtained coercivity was more than 500 Oe. MCD analysis using the K absorption edge suggests that the magnetic anisotropy could originate from the orbital magnetic moment of 3d electrons in Fe; this result is consistent with that in a previous report obtained with synthetic L1 0 -FeNi.

Original languageEnglish
Article number064206
JournalJournal of Physics Condensed Matter
Issue number6
Publication statusPublished - 2014 Feb 12

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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