Size-dependent indirect exchange

被引:1
|
作者
Nagaev, EL
Podelshchikov, AI
机构
[1] Institute for High Pressure Physics, Troitsk
关键词
D O I
10.1016/0304-8853(95)00615-X
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The size dependence of the indirect exchange in small particles and thin films has been investigated theoretically. The surface contribution to the effective exchange integral is found, as well as renormalization of the bulk indirect exchange due to the surface shift of the Fermi momentum. In typical cases the decay of the surface indirect exchange with the inter-spin distance is essentially slower than the decay of the bulk exchange. The critical carrier density up to which the ferromagnetic ordering is stable is higher for small samples than for bulk samples.
引用
收藏
页码:227 / 232
页数:6
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