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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
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.
Keywords: CoFe alloy; magnetic moment; lattice parameter
DOI: http://dx.doi.org/10.4283/JMAG.2014.19.1.001
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