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

Journal Article · Wed May 07 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4867229· OSTI ID:22273771

Chang, Y. C. ^[1]; Liu, Y. T.; Liu, S. H.; Chen, S. K. ^[2]; Sun, A. C. ^[3]

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1. Department of Material Science and Engineering, National Tsing Hua University, Hsinchu 300, Taiwan (China)
2. Department of Material Science and Engineering, Feng Chia University, Taichung 407, Taiwan (China)
3. Department of Chemical Engineering and Material Science, YunZe University, Chungli 135, Taiwan (China)

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.

• OSTI ID: 22273771
• Journal Information: Journal of Applied Physics, Vol. 115, 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); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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