Kinetic arrest of martensitic transformation in NiCoMnA1 metamagnetic shape memory alloy

Xiao Xu, Wataru Ito, Masashi Tokunaga, Rie Y. Umetsu, Ryosuke Kainuma, Kiyohito Ishida

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

Magnetic properties and martensitic transformation behaviors of N1CoMnAI metamagnetic shape memory alloys were investigated. The kinetic arrest phenomenon was observed at about 40 K during thermomagnetization measurements. At temperatures ranging from 4.2 to 200 K, magnetic field-induced reverse transformation was confirmed by a pulse magnetometer with a magnetic field up to 45 T. By plotting the equilibrium magnetic fields against the measured temperature, the transformation entropy change was calculated by using the Clausius Clapeyron equation. The transformation entropy change was found to become zero below 40 K, which can explain the appearance of the kinetic arrest phenomenon.

Original languageEnglish
Pages (from-to)1357-1360
Number of pages4
JournalMaterials Transactions
Volume51
Issue number7
DOIs
Publication statusPublished - 2010 Jul

Keywords

  • Kinetic arrest
  • Meta
  • Nagnetic shape memory alloy
  • NiCoMnAl

ASJC Scopus subject areas

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

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