Instability of the parent phase in nearly ordered Fe3Pt invar alloys

Takashi Fukuda, Takuya Yamamoto, Masataka Yamamoto, Tomoyuki Kakeshita

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationSolid-Solid Phase Transformations in Inorganic Materials
PublisherTrans Tech Publications Ltd
Pages79-83
Number of pages5
ISBN (Print)9783037851432
DOIs
Publication statusPublished - 2011

Publication series

NameSolid State Phenomena
Volume172-174
ISSN (Print)1012-0394

Keywords

  • Ferromagnetic shape memory alloy
  • Iron-platinum alloy
  • Martensitic transformation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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