The thermal transformation arrest phenomenon in NiCoMnAl heusler alloys

Xiao Xu, Wataru Ito, Masashi Tokunaga, Takumi Kihara, Kengo Oka, Rie Y. Umetsu, Takeshi Kanomata, Ryosuke Kainuma

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

In this report, we present findings of systematic research on NiCoMnAl alloys, with the purpose of acquiring a higher thermal transformation arrest temperature (TA). By systematic research, TA in the NiCoMnAl alloy systems was raised up to 190 K, compared to the highest TA of 130 K in NiCoMnIn. For a selected alloy of Ni40Co10Mn33Al17, magnetization measurements were performed under a pulsed high magnetic field, and the critical magnetic field-temperature phase diagram was determined. The magnetic phase diagram for Ni50-xCoxMn50-yAly was also established. Moreover, from the discussion that the formerly called “kinetic arrest phenomenon” has both thermodynamic and kinetic factors, we suggest a terminology change to the “thermal transformation arrest phenomenon”.

Original languageEnglish
Pages (from-to)298-311
Number of pages14
JournalMetals
Volume3
Issue number3
DOIs
Publication statusPublished - 2013 Sep 1

ASJC Scopus subject areas

  • Materials Science(all)

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