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Title: Domain wall pinning on strain relaxation defects (stacking faults) in nanoscale FePd (001)/MgO thin films

FePd (001) films, prepared by an electron beam deposition system on MgO(100), exhibit a perpendicular magnetic anisotropy (1.7 × 10{sup 7 }erg/cc) with a high order parameter (0.92). The relation between stacking faults induced by the strain relaxation, which act as strong domain wall pinning sites, and the perpendicular coercivity of (001) oriented L1{sub 0} FePd films prepared at different temperatures have been investigated. Perpendicular coercivity can be apparently enhanced by raising the stacking fault densities, which can be elevated by climbing dissociation of total dislocation. The increased stacking fault densities (1.22 nm{sup −2}) with large perpendicular coercivity (6000 Oe) are obtained for samples prepared at 650 °C. This present work shows through controlling stacking fault density in FePd film, the coercivity can be manipulated, which can be applied in future magnetic devices.
Authors:
;  [1] ;  [2] ;  [3] ;  [4]
  1. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan (China)
  2. Institute of Physics, Academia Sinica, Taipei 11529, Taiwan (China)
  3. Material and Chemical Research Laboratories and Nanotechnology Research Center, Industrial Technology Research Institute, Hsinchu 31040, Taiwan (China)
  4. Department of Applied Physics, Tunghai University, Taichung 40704, Taiwan (China)
Publication Date:
OSTI Identifier:
22482213
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 14; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANISOTROPY; COERCIVE FORCE; DEPOSITION; DISLOCATIONS; ELECTRON BEAMS; MAGNESIUM OXIDES; MAGNETIC FLUX; NANOSTRUCTURES; ORDER PARAMETERS; RELAXATION; STACKING FAULTS; STRAINS; THIN FILMS