Abstract
The structural, electronic, and magnetic properties of the binary and ternary carbides (Fe,Cr)3C and (Fe,Cr)7C3 have been investigated within the ab initio density functional theory. The crystal structure of the binary carbides has been optimized and the preferred positions for replacement of chromium or iron impurities in the corresponding carbides have been determined. The changes in the electronic structure and magnetic properties have been investigated, the formation energies of the ternary carbides as functions of the impurity concentrations have been calculated, and conclusions have been drawn regarding the influence of the impurity on the stability of the carbides under investigation.
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