Magnetoresistance of Fe3O4/Au/Fe3O4 and Fe3O4/Au/Fe spin-valve structures

被引：16

作者：

van Dijken, S ^{[1
]}

Fain, X ^{[1
]}

Watts, SM ^{[1
]}

Nakajima, K ^{[1
]}

Coey, JMD ^{[1
]}

机构：

[1] Univ Dublin Trinity Coll, SFI Trinity Nanosci Lab, Dept Phys, Dublin 2, Ireland

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 280卷 / 2-3期

基金：

爱尔兰科学基金会;

关键词：

magnetite; magnetoresistance; magnetic spin valve;

D O I：

10.1016/j.jmmm.2004.03.030

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A detailed study of the in-plane magnetotransport properties of spin valves with one and two Fe3O4 electrodes is presented. Fe3O4/Au/Fe3O4 spin valves exhibit a clear anisotropic magnetoresistance in small magnetic fields but no giant magnetoresistance (GMR). The absence of GMR in these structures is due to simultaneous magnetization reversal in the two Fe3O4 layers. By contrast, a negative GMR effect is measured on Fe3O4/Au/Fe spin valves. The negative GMR is attributed to an electron spin scattering asymmetry at the Fe3O4/Au interface or an induced spin scattering asymmetry in the Au interfacial layers. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：322 / 326

页数：5

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