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

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 μ{sub B} per Fe-atom. XAS and XMCD studies indicate the formation of a heterostructure (Fe/FeO/Fe{sub 2}O{sub 3}) 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.
Authors:
;  [1] ; ;  [2] ; ;  [3]
  1. Advanced Analysis Center, Korea Institute of Science and Technology, Seoul 136-791 (Korea, Republic of)
  2. Materials Science Division, Inter-University Accelerator Centre, New Delhi 110-067 (India)
  3. National Synchrotron Radiation Research Center, Hsinchu 30 076, Taiwan (China)
Publication Date:
OSTI Identifier:
22273873
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTROSCOPY; ANISOTROPY; ELECTRON BEAMS; ELECTRONIC STRUCTURE; HETEROJUNCTIONS; INTERFACES; IRON; IRON OXIDES; LAYERS; MAGNESIUM OXIDES; MAGNETIC CIRCULAR DICHROISM; MAGNETIC MOMENTS; SUM RULES; X RADIATION; X-RAY SPECTROSCOPY