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通过对合金Ni43Mn46Sn11Six(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3 T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-·1K-1。此外,还利用连续和不连续降温两种方法对Ni43Mn46Sn11Six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3 T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-·1K-1。
By studying the magnetocaloric effect of Ni43Mn46Sn11Six alloy (x = 0.0,0.1,0.2,0.3), it was found that with the increase of Si content, the transition temperature (TM) of alloy decreased from 187 K to 160 K, and the magnetic entropy change of the alloy also slightly decreased . When the field changes to 3 T, with the increase of x, the magnetic entropy change of the alloy are 28.7, 24.7, 26.1 and 23.3 J.kg- · 1K-1, respectively. In addition, the isothermal magnetization curves of Ni43Mn46Sn11Six alloy were measured by two methods, continuous and discontinuous cooling. For example, for the samples with x = 0, the magnetic entropy changes calculated by the continuous and discontinuous cooling methods are 28.74 and 38.56 J · kg- · 1K-1.