Preparation of GaAs_1−xP_x Compounds from the Melt under Controlled Vapour Pressures

Abstract

Crystalline solid solutions between GaAs and GaP compounds were prepared from the melt under controlled vapour pressures. The experimental results were found to agree with the theoretical formulae derived in order to calculate the pseudo-equilibrium in a heterogeneous system consisting of two parts with different temperatures. It was assumed that all condensed phases would be regular or sub-regular and that the gas phase is ideal. In addition, some of the thermodynamic properties of the Ga-As-P ternary system were discussed. It was found that one can apply the concept of pseudo-equilibrium to the preparation of crystalline solid solutions of III-V compounds containing two volatile components.