中文摘要：

采用电弧熔炼浇铸法和退火处理制备了系列合金A和B：A为（Tb1-xHox）0.2Pr0.8（Fe0.4Co0.6）1.88C0.05（x=0，0．2，0．4，0．6，0．8，1）合金，B为（Tb0.2DyxHo0.8-x）0.2Pr0.8（Fe0.4Co0.6）1.88C0.05（x=0，0．1，0．2，0．3，0．4，0．5）合金。X射线衍射（XRD）分析表明，合金均具有单一的立方Laves相结构。对于合金A，X=0．8时，磁晶各向异性较小，易磁化方向为〈111〉方向，合金的磁致伸缩系数达到极大值（504×10^-6）；对于合金B，当x=0.3时，合金的磁致伸缩系数达到极大值（565．7×10^-6）。

英文摘要：

Series of alloys A：（Tb1-xHox）0.2Pr0.8（Fe0.4Co0.6）1.88Co0.05（x=0,0.2,0.4,0.6,0.8,1） and B：（Tb0.2Dyx-Ho0.8-x）0.2Pr0.8（Fe0.4Co0.6）1.88C0.05（X=0,0.1,0.2,0.3,0.4,0.5） were prepared by arc-melting top casting method and subsequent annealing. The XRD analysis shows that a single cubic Laves phase forms both in the alloys A and B. For the alloys A, magnetic measurements indicate that the magnetostriction, 2a, increases with the increase of the Ho content, and gets to the maximum value when x=0.8 and then the 2a decreases. The anisotropy of the compound is the minimum and the direction of easy magnetization is 〈111〉 when x=0.8. Similarly, for alloy B, the 2a gets to the maximum when x= 0.3.