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
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
收藏
页码:276 / 279
页数:4
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