Nd_2(Co_(1-x)Fe_x)_(17-y)Cr_y化合物的结构和磁性研究  

A Studies of Structure and Magnetic Properties of Compounds Nd_2(Co_(1-x)Fe_x)_(17-y)Cr_y

作　　者：苏峰[1] 王文全[1] 王向群[1] 王学凤[1] 赵素芬[1] 杜晓波[1] 闫羽[1] 金汉民[1] 

机构地区：[1]吉林大学物理科学学院,长春130023

出　　处：《吉林大学学报（理学版）》2002年第2期170-174,共5页Journal of Jilin University:Science Edition

基　　金：吉林大学纳米专项基金

摘　　要：利用 X射线衍射和磁性测量研究 Nd2 ( Co1- x Fex) 17- y Cry 化合物的结构和磁性 .实验结果表明 ,这些化合物都具有 Th2 Zn17型结构 ,Cr和 Fe替代 Nd2 Co17化合物中 Co并未改变晶体结构 ,但能引起晶格膨胀 .所有化合物在室温下都表现为易面各向异性 .化合物的居里温度随着 Fe含量的增加和稳定元素 Cr含量的减小而升高 ,在 x=0 .5和 y=3 .3时达到最大值 。The structure and magnetic properties of compounds Nd 2(Co 1-xFe x) 17-yCr y were investigated by means of X-ray diffraction and magnetic measurements. It was found that all the compounds investigated are of the Th 2Zn 17-type structure. The substitution of Cr and Fe for Co doesnt change the crystalline structure, but leads to an increase of the unit-cell volume. The X-ray diffraction patterns of the magnetically aligned powder samples indicate that the easy magnetization directions (EMD) at room temperature are in the basal plane for all Nd 2(Co 1-xFe x) 17-xCr y compounds. With increasing content Fe and decreasing Cr content, the Curie temperature T C increases first, reaching a maximum at x=0 5 and y=3 3, then decreases monotonically.

关 键 词：Nd2(Co1-xFex)17-yCry化合物 居里温度 晶体结构 磁性 磁化强度 磁化方向 

分 类 号：O614.335[理学—无机化学] O482.5[理学—化学]