SPINODAL DECOMPOSITION IN AN ORDER-DISORDER TRANSITION - EFFECT OF INTERFACIAL PROPERTIES

A model C system is defined by the presence of a nonconserved order pa rameter coupled to a conserved concentration. When such a system is qu enched from the disordered state into the order-disorder coexistence r egion of its phase diagram, two different types of interfaces, an orde r-order and an order-disorder interface, form. We discuss how changes in the associated wetting properties of the interfaces modify the morp hology of the growing domains. The ratio between the surface tensions is therefore an important parameter in determining the universality cl asses at late times.