Martensitic transformation in a ferromagnetic Co–Ni–Ga single crystal
Martensitic transformation in a ferromagnetic Co–Ni–Ga single crystal
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DOI：
10.1016/j.msea.2003.10.361
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发表时间：
2004-07
期刊：
影响因子：
6.4
通讯作者：
V. Chernenko;J. Pons;E. Cesari;A. Perekos
中科院分区：
文献类型：
--
作者：
V. Chernenko;J. Pons;E. Cesari;A. Perekos
本文报道了单晶铁磁合金Co_（49.0）Ni_（22.0）Ga_（29.0）马氏体相变的力学和磁学特性。实验发现，该相变行为的特征在于量热和磁化率曲线上的温度滞后（30 K）和应力-应变依赖性上的应力滞后（超过200 MPa）。用Clausius-Clapeyron方程定量地描述了诱发马氏体的临界应力与温度的线性关系。不同的结果进行了比较，Ni-Mn-Ga系统和讨论，导致稀缺的可能性，这种钴镍镓合金表现出大的磁应变效应（“磁性形状记忆”）在几个Ni-Mn-Ga合金中观察到。
The results of mechanical and magnetic characterization of martensitic transformation in a single crystalline ferromagnetic Co49.0Ni22.0Ga29.0alloy are presented. The transformation behavior is experimentally found to be characterized by an enlarged temperature hysteresis (30K) on the calorimetric and magnetic susceptibility curves and stress hysteresis (over 200MPa) on stress–strain dependencies. The linear dependence of the critical stress to induce martensite as a function of temperature is quantitatively described by a Clausius–Clapeyron equation. The different results are compared to the Ni–Mn–Ga system and discussed, resulting in scarce possibilities for this Co–Ni–Ga alloy to exhibit the large magnetostrain effect (“magnetic shape memory”) observed in several Ni–Mn–Ga alloys.