Kinetic arrest behavior in martensitic transformation of NiCoMnSn metamagnetic shape memory alloy
Kinetic arrest behavior in martensitic transformation of NiCoMnSn metamagnetic shape memory alloy
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DOI：
10.1016/j.jallcom.2010.10.176
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发表时间：
2011-02
影响因子：
6.2
通讯作者：
R. Umetsu;K. Ito;W. Ito;K. Koyama;T. Kanomata;K. Ishida;R. Kainuma
中科院分区：
文献类型：
--
作者：
R. Umetsu;K. Ito;W. Ito;K. Koyama;T. Kanomata;K. Ishida;R. Kainuma
采用高场磁测量方法研究了NiCoMnSn变磁形状记忆合金的场致逆马氏体相变和动力学滞止行为。在热磁化曲线中，证实了施加5T的磁场使逆马氏体相变温度降低了67K，而在5T以下的磁场冷却过程中，马氏体相变在低温下不发生。由磁化曲线中变磁性证据的临界磁场定义的平衡磁场在低于约100K时几乎保持恒定，表明熵变变为零，这被认为是导致动力学停滞行为的原因。
High-field magnetic measurements were carried out in order to investigate behaviors of field-induced reverse martensitic transformation and kinetic arrest of NiCoMnSn metamagnetic shape memory alloy. In the thermomagnetization curves, it was confirmed that the reverse martensitic transformation temperature decreases 67K by applying magnetic field of 5T, while in the magnetic field cooling process under 5T, martensitic transformation does not occur down to low temperatures. Equilibrium magnetic field, defined from the critical magnetic fields of the metamagnetic evidence in the magnetization curves, exhibits almost constant below about 100K, suggesting that the entropy change becomes zero, which is considered to cause kinetic arrest behavior.