Exponential behavior of the interlayer exchange coupling across nonmagnetic metallic superlattices

被引：7
|
作者：
Ferreira, MS [1 ]
Castro, JDE
Muniz, RB
Lopes, LC
机构：
[1] Univ Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ, Brazil
[2] Univ Fed Rio de Janeiro, Inst Fis, BR-21945970 Rio De Janeiro, Brazil
来源：
PHYSICAL REVIEW B | 1998年 / 58卷 / 13期
关键词：
D O I：
10.1103/PhysRevB.58.8198
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
It is shown that the coupling between magnetic layers separated by nonmagnetic metallic superlattices can decay exponentially as a function of the spacer thickness N, as opposed to the usual N-2 decay. This effect is due to the lack of constructive contributions to the coupling from extended states across the spacer. The exponential behavior is obtained by properly choosing the distinct metals and the superlattice unit cell composition.
引用
收藏
页码：8198 / 8201
页数：4
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