| Abstract: | Temperature dependence of the heat capacity of the solid solutions (InP)x(InAs)1-x has been investigated over the temperature range from 5 to 300 K. Solid solution samples with x = 1; 0.8; 0.6; 0.4; 0.2; 0.1; 0 produced by means of crystallization from the melt the following annealing and diffusion in the powder at temperature close to solidus have been studied. The absolute values of enthalpy H, entropy S, Gibbs free energy Z as well as their deviations from the additive values have been obtained for the (InP)x(InAs)1-x system from the analysis of the thermodynamic properties of the solid solutions of the III–V compounds at low temperatures. The curves for the characteristic temperatures (T) of the solid solutions studied show that the change of the character of the phonon spectrum is negligible, the thermodynamic functions are close to additive, the influence of the enthalpy and entropy of mixing on the deviations from the additive enthalpy and entropy of the alloys is insignificant. |
