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

doi:10.3390/met3030298

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 journal › Article › peer-review

36 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 (T_A). By systematic research, T_A in the NiCoMnAl alloy systems was raised up to 190 K, compared to the highest T_A 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 Ni_50-xCo_xMn_50-yAl_y 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 language	English
Pages (from-to)	298-311
Number of pages	14
Journal	Metals
Volume	3
Issue number	3
DOIs	https://doi.org/10.3390/met3030298
Publication status	Published - 2013 Sept 1

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title = "The thermal transformation arrest phenomenon in NiCoMnAl heusler alloys",

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”.",

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AU - Xu, Xiao

AU - Ito, Wataru

AU - Tokunaga, Masashi

AU - Kihara, Takumi

AU - Oka, Kengo

AU - Umetsu, Rie Y.

AU - Kanomata, Takeshi

AU - Kainuma, Ryosuke

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AB - 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”.

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The thermal transformation arrest phenomenon in NiCoMnAl heusler alloys

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