(浙江大学材料科学与工程系， 杭州 310027)
摘 要: 详细研究了Ga取代R3(Fe,Mo)29(R=Sm,Y)（Ga <0.15 )中的部分Fe对其结构和内禀磁性的影响， 包括不同的Ga取代对R3(Fe,Mo)29化合物的晶胞常数、 居里温度、 饱和磁化强度、 磁晶各向异性的影响。结果表明：在R3(Fe,Mo,Ga)29化合物中， 随着Ga含量的增加， 晶胞体积膨胀， 居里温度升高， 饱和磁化强度下降，Fe原子的平均磁矩降低， Sm3(Fe0.966-xMo0.034Gax)29化合物的各向异性由平面向锥面结构转变,继续增加Ga含量， 有可能出现单轴各向异性。
关键字: 关键词: Sm3(Fe,Mo)29化合物 Ga掺杂 内禀磁性
（Department of Materials Science and Engineering,Zhejiang University, Hangzhou 310027, P. R. China）
Abstract:The structure and intrinsic magnetic properties, which included lattice parameters, Curie temperatures, saturation magnetization, and magnetocrystalline anisotropy, of R3(Fe,Mo)29 compounds(R=Sm and Y) with Ga substituted for Fe have been investigated in detail. The results show that, with an increase in Ga content, the unit cell volume expands and the Curie temperature increases, but the saturation magnetization and average Fe content decrease, and the magnetocrystalline anisotropy changes from plane to conical plane in Sm3 ((Fe0.966-xMo0.034Gax)29 compounds. It is possible that the magnetocrystalline anisotropy could change from conical plane to uniaxial with a further increase of Ga content in Sm3(Fe0.966-xMo0.034Gax)29 compounds.
Key words: R3(Fe, Mo)29 compounds Ga substitution intrinsic magnetic properties
