Nd_2Fe_(17)N_x化合物的交换耦合和磁性  

Exchange coupling and magnetism of compounds Nd_2Fe_(17)N_x

作　　者：董建敏[1] 李华[1] 陈丽[1] 

机构地区：[1]山东大学物理与微电子学院,山东济南250100

出　　处：《山东大学学报（理学版）》2003年第3期74-75,98,共3页Journal of Shandong University(Natural Science)

基　　金：国家 8 63计划 (2 0 0 2AA3 2 40 5 0 );山东省自然科学基金 (Y2 0 0 2D9)资助项目

摘　　要：用MS Xα方法研究了Nd2 Fe1 7Nx 化合物的电子结构和磁性质 ,发现在Fe(f)和Fe(c)晶位间存在着负交换耦合 ,间隙N原子的作用使化合物的元胞体积稍为增大 ,因此负交换耦合强度减弱 .计算结果表明 。The electron structure and magnetism of compounds Nd 2Fe 17N x were studied with MS-Xα method. We found that there are negative exchange couplings between Fe(f) and Fe(c) sites. Interstitial atoms N make the volume of the compounds increase a little, and therefore the intension of the exchange coupling weakens. It appears that symmetry of the crystal structure and the distance between atoms are the key factors effecting its magnetism and Curie temperature.

关 键 词：交换耦合 原子团簇 电子结构 原子磁矩 

分 类 号：O441.2[理学—电磁学]