Absence of tunnel magnetoresistance in Sr2FeMoO6-based magnetic tunnel junctions

被引：20

作者：

Fix, T. ^{[1
]}

Barla, A. ^{[1
]}

Ulhaq-Bouillet, C. ^{[1
]}

Colis, S. ^{[1
]}

Kappler, J. P. ^{[1
]}

Dinia, A. ^{[1
]}

机构：

[1] Univ Strasbourg, UMR 7504 CNRS, IPCMS, ECPM, F-67034 Strasbourg, France

来源：

CHEMICAL PHYSICS LETTERS | 2007年 / 434卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2006.12.020

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

X-ray magnetic circular dichroism (XMCD) and X-ray photoemission spectroscopy (XPS) are performed on a Sr2FeMoO6 thin film to explain the absence of tunnel magnetoresistance in a fully epitaxial magnetic tunnel junction integrating a Sr2FeMoO6 electrode, despite the high quality of the deposition. Although superconducting quantum interference device (SQUID) measurements indicate a room temperature magnetization of 3.2 mu(B)/formula unit, the surface magnetic moment deduced from XMCD is anomalously weak. This is consistent with a lack of Fe at the surface of Sr2FeMoO6 as observed by XPS leading to an absence of tunnel magnetoresistance. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：276 / 279

页数：4

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