用Ga取代部分Fe对R₃(Fe,Mo)₂₉结构及磁性的影响

来源期刊：中国有色金属学报1998年第3期

论文作者：潘洪革

文章页码：375 - 378

关键词：Sm₃(Fe,Mo)₂₉化合物； Ga掺杂； 内禀磁性

Key words：R₃(Fe, Mo)₂₉ compounds ； Ga substitution； intrinsic magnetic properties

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(Fe_0.966-xMo_0.034Ga_x)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。

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 ((Fe_0.966-xMo_0.034Ga_x)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(Fe_0.966-xMo_0.034Ga_x)₂₉ compounds.