中文摘要：

通过X射线衍射及磁测量手段研究了Er-Fe10.5-xCrxMo1.5（x=0、0.5、1、1.5、2、2.5、3）化合物的结构与居里温度。研究结果表明,ErFe10.5-xCrxMo1.5化合物均为ThMn12型结构。Cr对Fe的替代导致单胞体积V和晶格参数a,c均呈现先减后增的变化趋势,这可能与Cr的择优占位有关。对磁性质的研究结果表明,随着Cr替代量x的增加,ErFe10.5-xCrxMo1.5化合物的居里温度单调下降,这可能是Cr替代引起3d次晶格中铁磁交换作用削弱和Cr择优占位共同作用的结果。

英文摘要：

The structure and Curie temperature of ErFe10.5-xCrxMo1.5（x=0,0.5,1,1.5,2,2.5,3） compounds have been investigated by means of X-ray diffraction and magnetization measurements.The compounds all crystallize in the ThMn12-type structure.With increasing Cr content,the unit-cell volume and the lattice constant a and c decrease first,and then increase.This may result from the preferential occupation of Cr.Magnetization measurements show that the Curie temperature Tc of ErFe10.5-xCrxMo1.5 compounds decrease monotonously with increasing x.This may be due to the comprehensive factors that the substitution of Cr for Fe weakens the Fe-Fe interaction and the preferential occupation of Cr in the ErFe10.5-xCrxMo1.5 compounds.