摘要
通过X射线衍射、磁测量和M ssbauer谱等测试方法研究了Nd(Fe1-xCox) 10 V2 的结构和磁性。结果表明 :Nd(Fe1-xCox) 10 V2 (x =0 ,0 .0 5 ,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) 10 V2 中的Fe原子 ,将择优占据 8i铁晶位。
The crystal structure and magnetic properties of Nd(Fe 1- x Co x ) 10 V 2 were studied by X ray diffraction, magnetic measurements and Mssbauer spectroscopy methods. The following conclusions were obtained: All Nd(Fe 1- x Co x ) 10 V 2( x =0, 0.05, 0.1, 0.15, 0.2) compounds crystallize in ThMn 12 type structure; the lattice constants decrease monotonically with the increasing of Co atom content x , Curie temperature T c increases monotonically with Co atom content x , and the saturation magnetization M s increases gradually with Co atom content x . Substitution of Co for Fe leads to a monotonic increase of the hyperfine interaction field H F on all Fe sites. Furthermore, the experiment results show that Co atom occupies preferentially 8i Fe site in Nd(Fe 1- x Co x ) 10 V 2 compounds.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2001年第6期1099-1103,共5页
The Chinese Journal of Nonferrous Metals
基金
江西省自然科学基金资助项目 ( 995 0 0 35 )
关键词
择优占位
晶体结构
居里温度
饱和磁化强度
穆斯堡尔谱
永磁材料
Nd(Fe 1- x Co x ) 10 V 2
preferential occupation
crystal structure
Curie temperature
saturation magnetization
Mssbauer spectroscopy
