Kinetic Arrest of Martensitic Transformation in Ni33.0Co13.4Mn39.7Ga13.9 Metamagnetic Shape Memory Alloy
Kinetic Arrest of Martensitic Transformation in Ni33.0Co13.4Mn39.7Ga13.9 Metamagnetic Shape Memory Alloy
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DOI：
10.2320/matertrans.mbw200915
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发表时间：
2010-03
影响因子：
1.2
通讯作者：
Xiao Xu;W. Ito;R. Umetsu;K. Koyama;R. Kainuma;K. Ishida
中科院分区：
文献类型：
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作者：
Xiao Xu;W. Ito;R. Umetsu;K. Koyama;R. Kainuma;K. Ishida
研究了Ni33.0Co13.4Mn39.7Ga13.9变磁形状记忆合金的马氏体和磁性能.通过热磁化测量在120 K左右观察到动力学停滞现象，并在4.2 ~ 300 K的不同温度范围内检测到磁场诱导相变（MFIT）。通过基于转变场和温度的平衡磁场和温度的评估，证实了在120 K以下转变熵变几乎变为零，这导致动力学停滞现象。
Martensitic and magnetic properties of Ni 33.0 Co 13.4 Mn 39.7 Ga 13.9 metamagnetic shape memory alloy were investigated. The kinetic arrest phenomenon was observed at about 120 K by thermomagnetization measurements, and magnetic field-induced transformation (MFIT) was also detected at various temperatures ranging from 4.2 to 300 K. By evaluation of the equilibrium magnetic fields and temperatures based on the transformation fields and temperatures, it was confirmed that the transformation entropy change below 120 K becomes almost zero, which results in the kinetic arrest phenomenon.