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Title: Influence of stoichiometry and growth temperature on the crystal structure and magnetic properties of epitaxial L1{sub 0} Fe-Pd (001) films

To investigate the crystallographic structure and the magnetic properties as a function of chemical composition (40–62 at. %) and substrate temperature (T{sub s} = 300–550 °C), we fabricated epitaxial FePd films of thickness 20 ± 2 nm by sputtering on MgO (100) single-crystal substrates. The ordering parameter, measured by x-ray diffraction with synchrotron radiation, and the perpendicular anisotropy of the Fe{sub 54}Pt{sub 46} films increased with increasing substrate temperature. For FePd films (T{sub s} = 550 °C) with varied Fe content, a direct correlation between the ordering parameter and the magnetocrystalline anisotropy field is found. The greatest ordering parameter, 0.84, and magnetocrystalline anisotropy field, ∼20 kOe, were obtained for FePd films of Fe concentration 54 at. %, indicating that an off-stoichiometric L1{sub 0} FePd might be preferable for engineering and applications.
Authors:
 [1] ;  [2] ; ; ;  [3] ; ;  [4] ;  [5] ;  [1]
  1. Department of Material Science and Engineering, National Tsing Hua University, Hsinchu 300, Taiwan (China)
  2. (China)
  3. National Synchrotron Radiation Research Center, Hsinchu 30077, Taiwan (China)
  4. Department of Material Science and Engineering, Feng Chia University, Taichung 407, Taiwan (China)
  5. Department of Chemical Engineering and Material Science, YunZe University, Chungli 135, Taiwan (China)
Publication Date:
OSTI Identifier:
22273771
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; ANISOTROPY; CHEMICAL COMPOSITION; CONCENTRATION RATIO; CORRELATIONS; CRYSTAL STRUCTURE; EPITAXY; INTERMETALLIC COMPOUNDS; IRON; MAGNESIUM OXIDES; MAGNETIC PROPERTIES; MONOCRYSTALS; PALLADIUM; STOICHIOMETRY; SUBSTRATES; SYNCHROTRON RADIATION; TEMPERATURE DEPENDENCE; THIN FILMS; X-RAY DIFFRACTION