ANALYTICAL METHOD FOR CALCULATION OF THE SHORT-RANGE ORDER IN ALLOYS

A new simple analytical approximation for calculations of the short-ra nge order parameters and their Fourier transform in disordered binary alloys with a Bravais crystal lattice and with atomic interactions of arbitrary effective radius of action is proposed. On the basis of the comparison with the Monte Carlo simulation data, the high numerical ac curacy of approximation is demonstrated and it is shown that this accu racy turns higher with the increase of the effective radius of atomic interactions. The developed approach may be also followed in studies o f magnetics within the framework of the Izing model, of fluids and amo rphous materials within the lattice gas model as well as in investigat ions of the low-dimension lattice systems. (C) 1998 Elsevier Science L td.