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Title: Spin and orbital moments of nanoscale Fe{sub 3}O{sub 4} epitaxial thin film on MgO/GaAs(100)

Nanoscale Fe{sub 3}O{sub 4} epitaxial thin film has been synthesized on MgO/GaAs(100) spintronic heterostructure, and studied with X-ray magnetic circular dichroism. We have observed a total magnetic moment (m{sub l+s}) of (3.32 ± 0.1)μ{sub B}/f.u., retaining 83% of the bulk value. Unquenched orbital moment (m{sub l}) of (0.47 ± 0.05)μ{sub B}/f.u. has been confirmed by carefully applying the sum rule. The results offer direct experimental evidence of the bulk-like total magnetic moment and a large orbital moment in the nanoscale fully epitaxial Fe{sub 3}O{sub 4}/MgO/GaAs(100) heterostructure, which is significant for spintronics applications.
Authors:
;  [1] ;  [2] ; ; ;  [3] ; ;  [1] ;  [1] ;  [4] ;  [5] ;  [6] ;  [7]
  1. York-Nanjing Joint Centre of Spintronics, School of Electronics Science and Engineering, Nanjing University, Nanjing 210093 (China)
  2. (United Kingdom)
  3. Spintronics and Nanodevice Laboratory, Department of Electronics, University of York, York YO10 5DD (United Kingdom)
  4. (China)
  5. National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093 (China)
  6. Department of Physics, University of York, York YO10 5DD (United Kingdom)
  7. Diamond Light Source, Didcot OX11 0DE (United Kingdom)
Publication Date:
OSTI Identifier:
22261565
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 14; 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; 77 NANOSCIENCE AND NANOTECHNOLOGY; EPITAXY; FERRITES; GALLIUM ARSENIDES; IRON OXIDES; MAGNESIUM OXIDES; MAGNETIC CIRCULAR DICHROISM; MAGNETIC MOMENTS; NANOSTRUCTURES; SPIN; THIN FILMS; X RADIATION