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在Tb2Fe17化合物中用Si替代Fe观察到晶格参数减小和居里温度升高.平均场理论分析指出,Si对Fe的替代使Fe-Fe间的交换作用明显增强、Tb-Fe间交换作用轻微地减弱.通过拟合Tb2Fe17-xSix(x=0.0,1.0,2.0,3.0,3.3)单晶的磁化曲线,得到了化合物在不同组分和温度下的各向异性常数.在Tb2(Fe,Si)17单晶的磁化和退磁The magnetic properties and narrow domain are investigated.The substitution of silicon for iron leads to the reduction of the lattice parameters,and the significant increase of the Curie temperature from 413K to 526K.The mean field analysis show that the
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