Electronic structure of Fe/MgO/Fe multilayer stack by X-ray magnetic circular dichroism

Title
Electronic structure of Fe/MgO/Fe multilayer stack by X-ray magnetic circular dichroism
Authors
Sanjeev GautamKandasami AsokanJitendra Pal SinghFan-Hsiu ChangHong-Ji Lin채근화
Keywords
electronic structure; XMCD; Fe/MgO/Fe multilayer
Issue Date
2014-05
Publisher
Journal of applied physics
Citation
VOL 115, NO 17, 17C109-1-17C109-3
Abstract
The interface properties of Fe/MgO/Fe multilayer stack were investigated by using X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD). The magnetic multilayers were deposited by electron beam evaporation method, which exhibits the attributes of perpendicular magnetic anisotropy (PMA). XAS analysis shows that Fe-layer forms a Fe-O-rich interface region with MgO-layer and a sum-rule analysis of the XMCD estimates the average magnetic moment of 2.31 ± 0.1 μB per Fe-atom. XAS and XMCD studies indicate the formation of a heterostructure (Fe/FeO/Fe2O3) on the interface. A phase transition in Fe-O stoichiometry at interface is also observed at low temperature (90 K), which may be useful in magnetic storage technology.
URI
https://pubs.kist.re.kr/handle/201004/48153
ISSN
00218979
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