(1. 南昌大學(xué) 化學(xué)與材料科學(xué)學(xué)院， 南昌 330047；
2. 北京師范大學(xué) 物理系， 北京 100875)
摘 要: 通過X射線衍射、磁測量和Mössbauer譜等測試方法研究了Nd(Fe1-xCox )10V2的結(jié)構(gòu)和磁性。結(jié)果表明：Nd(Fe1-xCox )10V2( x =0, 0.05,0.1,0.15,0.2)化合物的晶體結(jié)構(gòu)均為ThMn12型結(jié)構(gòu)；隨著Co含量增大，晶格常數(shù)將單調(diào)減少，居里溫度Tc呈單調(diào)增大，飽和磁化強(qiáng)度Ms逐漸增加。Co部分取代Nd(Fe1-xCox )10V2中的Fe原子，將擇優(yōu)占據(jù)8i鐵晶位。
關(guān)鍵字: Nd(Fe1-xCox )10V2；擇優(yōu)占位； 晶體結(jié)構(gòu)； 居里溫度； 飽和磁化強(qiáng)度； Mössbauer譜
（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
