标题:Electronic Structure and Magnetism in Sm(Co,Cu)7
作者:张昌文[1];李华[1];董建敏[1];郭永权[2];李卫[2]
作者机构:[张昌文;李华;董建敏]SchoolofPhysicsandMicroelectronics,ShandongUniversity,Jinan250100.;[郭永权;李卫]InstituteofFunctionalMaterials,CentralIron&SteelRe 更多
通讯作者地址:[Li, H]Shandong Univ, Sch Phys & Microelect, Jinan 250100, Peoples R China.
来源:中国物理快报:英文版
出版年:2005
卷:22
期:8
页码:2055-2058
关键词:电子结构;电磁学;电子密度;原子磁性;
摘要:The electronic density of states, spin-splittings and atomic magnetic moments of SmCo7-xCux are studied by means of the spin-polarized multi-scattering Xα method. The results show that a few of the electrons can transfer to the Sm 5d^0 orbital due to orbital hybridization between Sm and Co. The exchange interactions between 3d and 5d electrons lead to the magnetic coupling between Sm and Co, and therefore result in the long-range ferromagnetic order in SmCo7-xCux. The Curie temperature of SmCo7-xCux is generally lower than that of the corresponding pure Co, which may be explained by the weaker average strength of coupling between Co lattices due to some negative exchange couplings mainly from the 2e site. The calculated results for the Sm5Co3oCu4 cluster may lead to a better understanding of why SmCo7-xCux is stable phase. Since the negative coupling of the 2e sites becomes small and the d bond at EF becomes stronger in contrast to SmCo7, which results in decrease of the free energy of the system, the stable ferromagnetic order forms in SmCo7-xCux.
收录类别:CSCD;SCOPUS;SCIE
WOS核心被引频次:2
Scopus被引频次:2
资源类型:期刊论文
原文链接:http://lib.cqvip.com/qk/84212X/200508/16160963.html
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