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

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

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
Volume26
Issue number6
DOIs
Publication statusPublished - 2014 Feb 12

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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