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用振动样品磁强计测量金属钆的磁化曲线，采用二步最小二乘法拟合出二元函数Ｍ（ Ｈ，Ｔ） 的表达式，然后通过热力学关系式计算出它的磁熵变．
The magnetization curves of gadolinium metal were measured by vibrating sample magnetometer. The expression of M (H, T) was fitted by the two-step least squares method and its magnetic entropy change was calculated by thermodynamic relationship.