Condensed Matter Physics, 1995, No. 5, p. 42-56, English
The phase transition theory developed by I. Yukhnovskii within the collective variables method is applied to the binary alloys. The features of the binary alloy problem in comparison with the Ising model are discussed and analized. The Jacobian of the transition from the site variables of the occupation number to the collective variables space is calculated. The explicit expression for the partition sum of the substitutional binary alloy is obtained.
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