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

页码：1872 / 1877

页数：6

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