Crystallization of the A(x)(III)B(1-x)(III)C(V) alloys from the supercooled liquid solutions

The initial stage crystallization of the A(x)(III)B(1-X)(III)C(V) quasibina ry alloys from the supercooled dilute liquid solutions is considered. Noneq uilibrium crystallization is presented by the minimum condition of the Helm holtz free energy. A model of the regular solutions is used for the descrip tion of the liquid and solid phases. The compositional dependencies of the GaxAl1-xAs and InxGa1-xP alloys on temperature and supercooling of the liqu id solutions are demonstrated. The affinities of the formation reactions of binary compounds constituting the A(x)(III)B(1-x)(III)C(V) alloys are equa l one another. Ratios between the affinities and temperature in the energy units are substantially smaller than unity for all considered growth proces ses. (C) 2001 Elsevier Science B.V. All rights reserved.