TITLE

The Thermal Transformation Arrest Phenomenon in NiCoMnAl Heusler Alloys

AUTHOR(S)
Xiao Xu; Wataru Ito; Masashi Tokunaga; Takumi Kihara; Kengo Oka; Rie Y. Umetsu; Takeshi Kanomata; Ryosuke Kainuma
PUB. DATE
September 2013
SOURCE
Metals (2075-4701);
SOURCE TYPE
DOC. TYPE
Article
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".
ACCESSION #
90500221

 

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