通过对合金Ni43 Mn46 Sn11 Six(x=0.0,0.1,0.2,0.3)磁热效应的研究,发现随着Si含量增加,合金的转变温度(TM)从187 K降到160K,合金的磁熵变也略微减小.在外场变化为3T时,随着x的增加,合金的磁熵变分别为28.7,24.7,26.1和23.3 J·kg-1·K-1.此外,还利用连续和不连续降温两种方法对Ni43 Mn46 Sn11 Six合金的等温磁化曲线进行了测量.发现两种测量方法测量的磁熵变值存在较大的差异,例如,对x=0的样品,在外场变化为3T时,连续和不连续降温测量方法算得的磁熵变分别为28.74和38.56 J·kg -1·K-1.
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