(1. 南昌大学 化学与材料科学学院， 南昌 330047；
2. 北京师范大学 物理系， 北京 100875)
摘 要: 通过X射线衍射、磁测量和Mössbauer谱等测试方法研究了Nd(Fe1-xCox )10V2的结构和磁性。结果表明：Nd(Fe1-xCox )10V2( x =0, 0.05,0.1,0.15,0.2)化合物的晶体结构均为ThMn12型结构；随着Co含量增大，晶格常数将单调减少，居里温度Tc呈单调增大，饱和磁化强度Ms逐渐增加。Co部分取代Nd(Fe1-xCox )10V2中的Fe原子，将择优占据8i铁晶位。
关键字: Nd(Fe1-xCox )10V2；择优占位； 晶体结构； 居里温度； 饱和磁化强度； Mössbauer谱
（1. College of Chemistry and Materials Sciences,
Nanchang University, Nanchang 330047, P.R.China;
2. Department of Physics, Beijing Normal University,
Beijing 100875, P.R.China）
Abstract:The crystal structure and magnetic properties of Nd(Fe1-xCox)10V2 were studied by X-ray diffraction, magnetic measurements and Mössbauer spectroscopy methods. The following conclusions were obtained: All Nd(Fe1-xCox )10V2(x =0, 0.05, 0.1, 0.15,0.2) compounds crystallize in ThMn12-type structure; the lattice constants decrease monotonically with the increasing of Co atom content x, Curie temperature Tc increases monotonically with Co atom content x, and the saturation magnetization Ms increases gradually with Co atom content x. Substitution of Co for Fe leads to a monotonic increase of the hyperfine interaction field HF on all Fe sites. Furthermore, the experiment results show that Co atom occupies preferentially 8i Fe site in Nd(Fe1-xCox )10V2 compounds.
Key words: Nd(Fe1-xCox )10V2; preferential occupation; crystal structure; Curie temperature; saturation magnetization; Mössbauer spectroscopy
