嵌埋于沸石分子筛中的Fe_n团簇的磁性能研究

Study on magnetic properties of Fe_n clusters embebed in zeolite molecule-sift

运用RKKY理论 ,推导了金属球形团簇间交换作用 ,并利用蒙特卡罗 (MC)方法模拟了嵌埋于沸石分子筛中的Fen 团簇体系的磁性能与团簇尺寸的关联效应。结果表明 :嵌埋式团簇体系的磁性能随团簇间距离呈震荡型 ,体系磁化强度随团簇分布密度及填充率的增大而增大 ,这对新型复合磁性材料的制备提供了参考。

The exchange interaction among metal spherical clusters had been discussed by means of RKKY theory. And the relation effect between the magnetic properties of Fe n clusters systems embeded in zeolite molecule-sift and the clusters dimension had been investigated by Monte Carlo simulation. It was shown that the magnetic properties of embeded clusters system oscillated with the distance between clusters, and its magnetization increased with the increasing of clusters density and fill efficiency. The results provided a guide for preparing new magnetic composite materials.