Field-induced martensitic transformation in new ferromagnetic shape memory compound Mn1.07Co0.92Ge

Keiichi Koyama, Masanari Sakai, Takeshi Kanomata, Kazuo Watanabe

Research output: Contribution to journalArticle

107 Citations (Scopus)

Abstract

The structural transformation of a ferromagnetic Mn1.07Co 0.92Ge compound was studied by magnetization measurement in magnetic fields up to 13 T and powder X-ray diffraction measurement in fields up to 5 T. The Curie temperature is determined to be 275 K. At room temperature, the compound has a hexagonal Ni2In-type structure, and it transforms diffusionlessly into an orthorhombic TiNiSi-type structure at MS = 210 K with hysteresis. The cell volume expands by 5.3% and the magnetic moment increases by 24% at MS, accompanied with this martensitic structural transformation. In addition, we confirmed for the first time that magnetic field induces the structural transformation in Mn1.07Co 0.92Ge at the vicinity of MS.

Original languageEnglish
Pages (from-to)8036-8039
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume43
Issue number12
DOIs
Publication statusPublished - 2004 Dec 1

Keywords

  • Ferromagnetic shape memory
  • High fields
  • MnCoGe
  • Powder X-ray diffraction
  • Structural transformation

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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