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| Structural and Magnetic Properties of Epitaxial FexCo100-x Alloys Grown on Cr Substrate |
| Journal of Magnetics, Volume 19, Number 1, 31 Mar 2014, Pages 1-4 |
M. B. Hossain (Department of Materials Science and Engineering, Chungnam National University), C. G. Kim (Department of Materials Science and Engineering, Chungnam National University), B. S. Chun (Division of Industrial Metrology, Korea Research Institute of Standards and Science), W. D. Kim (Division of Industrial Metrology, Korea Research Institute of Standards and Science), C. Hwang *  (Division of Industrial Metrology, Korea Research Institute of Standards and Science) |
| Abstract |
We report the correlation between the magnetic properties and lattice parameter of FexCo100-x alloys as a function of constituent concentration. The saturation magnetization increases with Fe content and has a maximum value at approximately x = 70 at.%. However, collapse in relative saturation magnetization is observed at approximately 30 at.% to 70 at.% of Fe in FexCo100-x alloys. The collapse is due to the formation of Co-Co and Fe-Fe antibonding states instead of Fe-Co bonds. The lattice parameter also shrinks at approximately 30 at.% to 70 at.% of Fe. This shrinkage is due to an increase in the number of nearest neighbor antisite atoms, which then leads to a decrease in the long range order parameter.
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| Keywords: CoFe alloy; magnetic moment; lattice parameter |
| DOI: http://dx.doi.org/10.4283/JMAG.2014.19.1.001 |
| Full Text: PDF |
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