CONTRIBUTION OF QUANTUM-WELL STATES TO THE RKKY COUPLING IN MAGNETIC MULTILAYERS

被引：61

作者：

JONES, BA ^{[1
]}

HANNA, CB ^{[1
]}

机构：

[1] IBM CORP,DIV RES,TJ WATSON RES CTR,YORKTOWN HTS,NY 10598

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.71.4253

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We calculate the RKKY coupling between two magnetic layers separated by a nonmagnetic spacer, with scattering potentials added to represent changes in environment between the layers. For the case of a spacer potential well of depth V, the usual pi/k(F) oscillation period is superseded by one much longer, piHBAR/square-root 2mV. For a deep potential well (V is similar to epsilon(F)), the RKKY interaction becomes purely ferromagnetic for spacings greater than a few angstroms. Scattering potentials localized at the interfaces produce a phase shift in the RKKY oscillations. We discuss evidence for these effects in experimental systems.

引用

页码：4253 / 4256

页数：4

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