Control of phase transformation temperatures by substituents in Ni-Fe-Ga ferromagnetic shape memory alloys

Haruhiko Morito, Katsunari Oikawa, Asaya Fujita, Kazuaki Fukamichi, Kiyohito Ishida, Ryosuke Kainuma

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The variations of the martensitic transformation starting temperature TMS and the Curie temperature TC in Ni-Fe-Ga alloys have been investigated by substituting with several kinds of the fourth elements. By partial substitution of Co or Cu for Ni, TC increases and TMS decreases. In particular, the increase of T C is remarkable in the Ni54-xCoxFe 19Ga27 alloy, which is related to the strong Ni-Co and Co-Fe exchange interactions. For the Ni54Fe19-xMn xGa27 alloys, TC slightly increases with the increase of Mn content, in analogy with the Ni52FexMn 21-xGa27 alloys. From the present study, it is demonstrated that both TC and TMS of the Ni-Fe-Ga alloys can be effectively controlled by selecting the substituents.

Original languageEnglish
Pages (from-to)2847-2850
Number of pages4
JournalMaterials Transactions
Volume48
Issue number11
DOIs
Publication statusPublished - 2007 Nov

Keywords

  • Curie temperature
  • Ferromagnetic shape memory alloy
  • Martensitic transformation
  • Nickel-iron-gallium alloy
  • Starting temperature
  • Substituent

ASJC Scopus subject areas

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

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