MISC

2009年3月

Neutron Diffraction Study of Martensitic Transformation of Off-Stoichiometric Single-Crystal Ni2MnGa

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
  • Kazuko Inoue
  • ,
  • Yasuo Yamaguchi
  • ,
  • Haruhiro Hiraka
  • ,
  • Toetsu Shishido
  • ,
  • Hidefumi Maeda
  • ,
  • Yorihiko Tsunoda

78
3
開始ページ
034602
終了ページ
記述言語
英語
掲載種別
DOI
10.1143/JPSJ.78.034602
出版者・発行元
PHYSICAL SOC JAPAN

Neutron diffraction was applied to investigate the martensitic transformation of an off-stoichiometric Heusler-type Ni2.16Mn0.78Ga1.06 single crystal (conduction electron-to-atom ratio = 7.56). The splitting of a cubic (020) peak on a reciprocal lattice c*-plane was traced with decreasing temperature from 400 to 37 K. It was found that an orthorhombic structure (a > b > c) appears slightly below the transformation temperature as a metastable transient precursor structure before the formation of a final stable tetragonal structure (a = b < c). The modes of deformation from cubic to orthorhombic are (i) simple shrinking and elongation of two cubic axes or (ii) a shuffling-like deformation along the cubic < 110 > direction on one of the cubic planes. The mode of deformation from orthorhombic to tetragonal is a shuffling-like deformation along the orthorhombic < 110 > direction on the orthorhombic c-plane. Both shuffling-like deformations originate from tilting deformations that preserve the common < 111 > direction.

Web of Science ® 被引用回数 : 1

リンク情報
DOI
https://doi.org/10.1143/JPSJ.78.034602
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000264596000022&DestApp=WOS_CPL

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