title: Large elastic strain and elastocaloric effect caused by lattice softening in an iron-palladium alloy.
abstract: A Fe-31.2Pd (at.%) alloy exhibits a weak first-order martensitic transformation from a cubic structure to a tetragonal structure near 230 K. This transformation is associated with significant softening of elastic constant C'. Because of the softening, the alloy shows a large elastic strain of more than 6% in the [001] direction. In addition, the alloy has a critical point and shows a high elastocaloric effect in a wide temperature range for both the parent and the martensite phases.This article is part of the themed issue 'Taking the temperature of phase transitions in cool materials'.
authors.affiliation: Department of Materials Science and Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita, Osaka 565-0871, Japan fukuda@mat.eng.osaka-u.ac.jp.
authors.forename: Tomoyuki
authors.identifier: 0000-0001-7753-6565
authors.initials: T
authors.lastname: Kakeshita
authors.affiliation: Department of Materials Science and Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita, Osaka 565-0871, Japan.
authors.forename: Fei
authors.initials: F
authors.lastname: Xiao
authors.affiliation: Department of Materials Science and Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita, Osaka 565-0871, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Fukuda
keywords: elastic deformation; martensite; phase transformation