Surface Pinning Effect of an Antiferromagnetic Interlayer Exchange Coupling in (Ga1-xMnxAs/GaAs:Be)10 Multilayer

Title
Surface Pinning Effect of an Antiferromagnetic Interlayer Exchange Coupling in (Ga1-xMnxAs/GaAs:Be)10 Multilayer
Authors
최준우김동옥조병관김재영정재호이상훈최용성이동렬이기봉
Issue Date
2017-07
Publisher
Journal of the Korean Physical Society
Citation
VOL 71, NO 2-125
Abstract
The depth-resolved magnetic configuration of a Ga0.97Mn0.03As/GaAs:Be multilayer with an antiferromagnetic interlayer exchange coupling was investigated using surface-sensitive soft x-ray resonant magnetic reflectivity (XRMR). We observed intriguing opposite increments in the XRMR intensities at the half-Bragg peak position between two different remanent states with opposite field sweep directions. A quantitative analysis shows that these opposite intensity increments result from two different anti-parallel spin configurations in such a way that the magnetization of top-most magnetic layer is pinned along the saturation magnetization direction before the remanent state. This surface pinning effect is important for understanding spin-dependent transport in semiconducting magnetic multilayers.
URI
http://pubs.kist.re.kr/handle/201004/66406
ISSN
0374-4884
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KIST Publication > Article
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