Influence of Co addition on martensitic and magnetic transitions in Ni-Fe-Ga β based shape memory alloys

Katsunari Oikawa, Yousuke Imano, Volodymyr A. Chernenko, Fenghua Luo, Toshihiro Omori, Yuji Sutou, Ryosuke Kainuma, Takeshi Kanomata, Kiyohito Ishida

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

The effect of Co addition on the martensitic transition and magnetic properties of the Ni-Fe-Ga β alloys is investigated. The values of both the Curie temperature T c and martensitic transition starting temperature M s increase, while the saturation magnetization I s decreases with increasing Co content in the series of Ni 51Fe 22-XCo XGa 27 alloys. On the other hand, the values of both T c and I s increase and M s decrease with increasing Co content in the series of Ni 54-XFe 19Co XGa 27 alloys. T c and I s show a strong dependence on the average magnetic valence number Zm. Consequently, Co is an effective element to control both the martensitic and the magnetic transition temperatures.

Original languageEnglish
Pages (from-to)734-737
Number of pages4
JournalMaterials Transactions
Volume46
Issue number3
DOIs
Publication statusPublished - 2005 Mar

Keywords

  • Iron-nickel-cobalt-gallium alloy
  • Martensitic transition
  • Phase diagram
  • Shape memory ferromagnetic alloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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