OSCILLATIONS IN EXCHANGE COUPLING ACROSS A NONMAGNETIC METALLIC LAYER

被引：94

作者：

EDWARDS, DM ^{[1
]}

MATHON, J ^{[1
]}

机构：

[1] CITY UNIV LONDON,DEPT MATH,LONDON EC1V 0HB,ENGLAND

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1991年 / 93卷

关键词：

D O I：

10.1016/0304-8853(91)90308-W

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The exchange coupling between two strong itinerant ferromagnets separated by N atomic planes of a nonmagnetic metal is calculated using a Hubbard-type model. It is shown that for certain positions of the Fermi level the variation of the exchange coupling with N exhibits oscillations of long period. The amplitude of the oscillations falls of as 1/N2 and agrees in order of magnitude with the exchange coupling observed by Parkin et al. in Co/Ru and Fe/Cr multilayers. Further agreement is the finding that antiparallel alignment of the ferromagnetic layers is favoured for small N. The relationship between the coupling found here and one of RKKY type is discussed.

引用

页码：85 / 88

页数：4

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