Abstract:
Electrical resistance of ternary and binary alloys was calculated in the coherent potential approximation. Concentration dependencies of electrical resistance at the maximum long-range order for a given composition were studied. The results are presented in graphical form. A comparison with the weak scattering limit has been made. For isoelectronic ternary alloys, it has been established that at low values of the valence electron number, the Fermi level is located quite far from the gap in the electron density of states that emerges with an increase in the concentration of the third component. In this case, the graphs of the dependence of the residual electrical resistance on the concentration of the third component, obtained in the coherent potential approximation (CPA) and in the weak scattering approximation (WSA), are qualitatively similar. With an increase in the number of valence electrons, the concentration dependencies of the resistance for CPA and WSA acquire qualitative differences.
Keywords:residual resistivity ratio, ternary and binary alloys, maximum order, coherent potential approximation.
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