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Title: X-ray magnetic circular dichroism study of epitaxial magnetite ultrathin film on MgO(100)

The spin and orbital magnetic moments of the Fe{sub 3}O{sub 4} epitaxial ultrathin film synthesized by plasma assisted simultaneous oxidization on MgO(100) have been studied with X-ray magnetic circular dichroism. The ultrathin film retains a rather large total magnetic moment, i.e., (2.73 ± 0.15) μ{sub B}/f.u., which is ∼70% of that for the bulk-like Fe{sub 3}O{sub 4}. A significant unquenched orbital moment up to 0.54 ± 0.05 μ{sub B}/f.u. was observed, which could come from the symmetry breaking at the Fe{sub 3}O{sub 4}/MgO interface. Such sizable orbital moment will add capacities to the Fe{sub 3}O{sub 4}-based spintronics devices in the magnetization reversal by the electric field.
Authors:
;  [1] ;  [2] ; ;  [3] ; ;  [4] ; ;  [5] ; ; ;  [6] ;  [1]
  1. York-Nanjing International Center for Spintronics (YNICS), School of Electronics Science and Engineering, Nanjing University, Nanjing 210093 (China)
  2. (United Kingdom)
  3. Center for Condensed Matter Sciences, National Taiwan University, Taipei 106, Taiwan (China)
  4. Spintronics and Nanodevice Laboratory, Department of Electronics, University of York, York YO10 5DD (United Kingdom)
  5. IBM Research Division, Almaden Research Center, San Jose, California 95120 (United States)
  6. Diamond Light Source, Didcot OX11 0DE (United Kingdom)
Publication Date:
OSTI Identifier:
22410136
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 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; CRYSTAL STRUCTURE; ELECTRIC FIELDS; EPITAXY; FERRITES; INTERFACES; IRON OXIDES; MAGNESIUM OXIDES; MAGNETIC CIRCULAR DICHROISM; MAGNETIC MOMENTS; MAGNETITE; MAGNETIZATION; SPIN; SYMMETRY BREAKING; THIN FILMS; X RADIATION