Unusual complex high temperature structure of Fe2VSi

O. Nashima, Y. Yamaguchi, H. Higashi, T. Goto, T. Kaneko, S. Sasamori, H. Kimura, K. Kobayashi, R. Kainuma, K. Ishida, T. Kanomata

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2 Citations (Scopus)


The α-Mn structure (A12) has been found above 1373 K as a new structure of Fe2VSi, which has the Heusler structure (L21) at room temperature. The Fe2VSi alloy with a single phase of the α-Mn structure was produced using the melt-quenching technique. When the sample was annealed at 1073 K, it transformed into the Heusler structure. In the next step, the Heusler Fe2VSi was annealed again at 1373 K and quenched into ice water, then the sample almost returned to the α-Mn structure. Detail of the crystal structure was investigated on the α-Mn phase by the neutron diffraction measurement. The high temperature α-Mn phase has more complex structure than the low temperature Heusler phase, and it is very unusual transformation because usually a high temperature phase has a simpler structure than its low temperature phase.

Original languageEnglish
Pages (from-to)150-154
Number of pages5
JournalJournal of Alloys and Compounds
Issue number1-2
Publication statusPublished - 2006 Jun 29


  • Crystal structure and symmetry
  • Crystal structure change
  • Heusler alloy
  • X-ray and neutron diffraction


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