TY - GEN
T1 - Instability of the parent phase in nearly ordered Fe3Pt invar alloys
AU - Fukuda, Takashi
AU - Yamamoto, Takuya
AU - Yamamoto, Masataka
AU - Kakeshita, Tomoyuki
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2011
Y1 - 2011
N2 - The martensitic transformation in a nearly ordered Fe3Pt is weak first order, and the martensite phase shows a large magnetic field-induced strain of several percent. We have investigated the origin of this transformation from its electronic structure. A characteristic feature in the electronic structure is the existence of a relatively high peak in the density of states of the minority spin band just below the Fermi energy. This peak splits into two peaks by tetragonal distortion, and one of them shifts to lower energy by the distortion, suggesting that the band Jahn-Teller effect is the main cause for the transformation.
AB - The martensitic transformation in a nearly ordered Fe3Pt is weak first order, and the martensite phase shows a large magnetic field-induced strain of several percent. We have investigated the origin of this transformation from its electronic structure. A characteristic feature in the electronic structure is the existence of a relatively high peak in the density of states of the minority spin band just below the Fermi energy. This peak splits into two peaks by tetragonal distortion, and one of them shifts to lower energy by the distortion, suggesting that the band Jahn-Teller effect is the main cause for the transformation.
KW - Ferromagnetic shape memory alloy
KW - Iron-platinum alloy
KW - Martensitic transformation
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U2 - 10.4028/www.scientific.net/SSP.172-174.79
DO - 10.4028/www.scientific.net/SSP.172-174.79
M3 - Conference contribution
AN - SCOPUS:79960914231
SN - 9783037851432
T3 - Solid State Phenomena
SP - 79
EP - 83
BT - Solid-Solid Phase Transformations in Inorganic Materials
PB - Trans Tech Publications Ltd
ER -