摘要
用X射线和磁性测量研究了Mn替代Fe对TbFe1 0 5Mo1 5型金属间化合物的结构和磁性的影响 .X射线衍射表明 :TbFe1 0 5-xMnxMo1 5(x =1 5 ,2 0 ,3 0 ,4 0 ,5 0 )化合物均为ThMn1 2 型四方结构 ,晶格常数和单胞体积均随Mn含量增加而增大 .磁性测量表明 :TbFe1 0 5-xMnxMo1 5(x =1 5 ,2 0 ,3 0 ,4 0 ,5 0 )化合物的居里温度和过渡金属次晶格磁矩随Mn含量的增加而逐渐降低 ;x =3 0化合物的热磁曲线上出现一个非零磁矩的类似补偿点 ;在 4 5K温度下 ,化合物的饱和磁矩随Mn含量的增加而缓慢减小 ;x =3.0时达到最小值 。
X-ray diffraction (XRD) and magnetization measurements were employed to investigate the effect of substitution of Mn for Fe on the structure and magnetic properties of TbFe10.5Mo1.5 compounds. XRD patterns show that the microstructures of TbFe10.5-xMnxMo1.5(x=1.5,2.0,3.04.0,5.0) compounds are of single phase with tetragonal ThMn12-type structures, of which the lattice constants and unit-cell volumes increase monotonically with the increase of Mn concentration. Magnetic measurements show that the Curie temperature Tc and magnetic moment of the transition-metal sublattice of TbFe10.5-xMnxMo1.5 compounds decrease monotonically with increasing Mn concentration. A point without zero moment similar to the compensation point is observed in the temperature dependence of magnetization for the TbFe10.5-xMnxMo1.5 compounds with x=3.0; the saturation magnetic moments at 4.5 K decrease slowly with increasing Mn concentration till x=3.0, then increase fast.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第6期750-753,共4页
Journal of Southeast University：Natural Science Edition
基金
江苏省自然科学基金资助项目 (BK2 0 0 2 0 63 )
关键词
金属间化合物
晶体结构
饱和磁化强度
居里温度
Crystal structure
Lattice constants
Magnetic moments
Manganese
Permanent magnets
Temperature
