TY - JOUR
T1 - Unusual complex high temperature structure of Fe2VSi
AU - Nashima, O.
AU - Yamaguchi, Y.
AU - Higashi, H.
AU - Goto, T.
AU - Kaneko, T.
AU - Sasamori, S.
AU - Kimura, H.
AU - Kobayashi, K.
AU - Kainuma, R.
AU - Ishida, K.
AU - Kanomata, T.
PY - 2006/6/29
Y1 - 2006/6/29
N2 - 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.
AB - 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.
KW - Crystal structure and symmetry
KW - Crystal structure change
KW - Heusler alloy
KW - X-ray and neutron diffraction
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U2 - 10.1016/j.jallcom.2005.09.046
DO - 10.1016/j.jallcom.2005.09.046
M3 - Article
AN - SCOPUS:33744500787
SN - 0925-8388
VL - 417
SP - 150
EP - 154
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - 1-2
ER -