Abstract
An Ising-Potts model is introduced and the Bragg-Williams mean-field method and Monte Carlo simulation are used to study its properties on the FCC lattice. It is shown that for certain values of the parameters in the Hamiltonian the model exhibits phase behaviour that can be interpreted as representing solid-liquid phase equilibria in binary alloy mixtures. The first-order transition properties of the pure six-state Potts model on the FCC lattice are also reported.
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