Oxidation-induced biquadratic coupling in Co/Fe/MgO/Fe(001)

被引：20

作者：

Chiang, Y. F. ^{[1
]}

Wong, Jared J. I. ^{[1
]}

Tan, X. ^{[1
]}

Li, Yan ^{[1
]}

Pi, K. ^{[1
]}

Wang, W. H. ^{[1
]}

Tom, H. W. K. ^{[1
]}

Kawakami, R. K. ^{[1
]}

机构：

[1] Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 18期

关键词：

cobalt; exchange interactions (electron); ferromagnetic materials; iron; Kerr magneto-optical effect; magnesium compounds; magnetic impurities; magnetic multilayers; oxidation; MAGNETIC TUNNEL-JUNCTIONS; ROOM-TEMPERATURE; EXCHANGE; MAGNETORESISTANCE; MULTILAYERS; MECHANISM; BARRIER; SYSTEMS; FILMS;

D O I：

10.1103/PhysRevB.79.184410

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the interlayer exchange coupling in Co/Fe/MgO/Fe(001) via molecular-beam epitaxy synthesis and magneto-optic Kerr effect measurements across wedged samples. By independently varying the oxygen contents of the MgO film and the Fe/MgO interface, the biquadratic coupling is found to be correlated with the interfacial oxidation. Furthermore, the temperature dependence indicates that the biquadratic coupling originates from indirect exchange interactions with magnetic impurities in the MgO spacer.

引用

页数：5

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