Kinetic Arrest of Martensitic Transformation in NiCoMnAl Metamagnetic Shape Memory Alloy

被引：58

作者：

Xu, Xiao ^{[1
]}

Ito, Wataru ^{[1
]}

Tokunaga, Masashi ^{[2
]}

Umetsu, Rie Y. ^{[1
]}

Kainuma, Ryosuke ^{[1
]}

Ishida, Kiyohito ^{[3
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

[2] Univ Tokyo, Inst Solid State Phys, Int MegaGauss Sci Lab, Kashiwa, Chiba 2778581, Japan

[3] Tohoku Univ, Dept Mat Sci, Grad Sch Engn, Sendai, Miyagi 9808579, Japan

来源：

MATERIALS TRANSACTIONS | 2010年 / 51卷 / 07期

基金：

日本学术振兴会;

关键词：

NiCoMnAl; metamagnetic shape memory alloy; kinetic arrest; MAGNETIC-FIELD;

D O I：

10.2320/matertrans.M2010098

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic properties and martensitic transformation behaviors of NiCoMnAl 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. [doi: 10.2320/matertrans.M2010098]

引用

页码：1357 / 1360

页数：4

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