Angle-resolved soft X-ray magnetic circular dichroism in a monatomic Fe layer facing an MgO(001) tunnel barrier

被引：11
|
作者：
Mamiya, K.
Koide, T.
Ishida, Y.
Osafune, Y.
Fujimori, A.
Suzuki, Y.
Katayama, T.
Yuasa, S.
机构：
[1] High Energy Accelerator Res Org, IMSS, Photon Factory, Tsukuba, Ibaraki 3050801, Japan
[2] Univ Tokyo, Dept Complex Sci & Engn, Kashiwa, Chiba 2778561, Japan
[3] Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan
[4] Natl Inst Adv Ind Sci & Technol, NanoElect Res Inst, Tsukuba, Ibaraki 3058568, Japan
来源：
RADIATION PHYSICS AND CHEMISTRY | 2006年 / 75卷 / 11期
关键词：
soft X-ray magnetic circular dichroism; tunnel magnetoresistance; low-dimensional magnetic systems; anisotropic magnetic moments;
D O I：
10.1016/j.radphyschem.2005.07.042
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：
The electronic and magnetic states of a monatomic Fe(001) layer directly facing an MgO(001) tunnel barrier were studied by angle-resolved X-ray magnetic circular dichroism (XMCD) at the Fe L-2,L-3 edges in the longitudinal (L) and transverse (T) arrangements. A strong XMCD reveals no oxidation of the 1-ML Fe, showing its crucial role in giant tunnel magnetoresistance effects in Fe/MgO/Fe magnetic tunnel junctions. Sum-rule analyses of the angle-resolved XMCD give values of a spin moment, in-plane and out-of-plane orbital and magnetic dipole moments. Argument is given on their physical implication. (c) 2006 Published by Elsevier Ltd.
引用
收藏
页码：1872 / 1877
页数：6
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