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Chemical structure and magnetism of feox/fe2o3 interface studied by x-ray absorption spectroscopy

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Title
Chemical structure and magnetism of feox/fe2o3 interface studied by x-ray absorption spectroscopy
Author(s)
Ahmed Yousef Mohamed; Won Goo Park; Deok-Yong Cho
Publication Date
2020-09
Journal
Magnetochemistry, v.6, no.3, pp.33
Publisher
MDPI
Abstract
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. The chemical and magnetic states of Fe/Fe2O3 thin films prepared by e-beam evaporation were investigated by using element-specific techniques, X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD). It was clearly shown that the Fe layers are oxidized to form an antiferromagnetic (AFM) FeOx<1, while the bottom oxide remained a weak ferromagnet (wFM) (α+γ)-type Fe2O3. Dependences of the peak intensities and lineshapes on the Fe thickness and measurement geometry further demonstrate that FeOx<1 layers reside mostly at the interface realizing an FM (Fe)/AFM (FeOx)/wFM (Fe2O3), whilst the spin directions lie in the sample plane for all the samples. The self-stabilized intermediate oxide can act as a physical barrier for spins to be injected into the wFM oxide, implying a substantial influence on tailoring the spin tunneling efficiency for spintronics application
URI
https://pr.ibs.re.kr/handle/8788114/8477
DOI
10.3390/magnetochemistry6030033
ISSN
2312-7481
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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