Phase diagrams and multicritical points in the ternary mixed‐spin alloy with a single‐ion anisotropy

Abstract

The phase diagram of the AB pC1−p ternary alloy consisting of different Ising spinsandin the presence of a single-ion anisotropy is investigated by the use of a mean-field theory. At finite temperature by changing values of the parameters of the model different types of phase diagrams are obtained, including critical end points and isolated critical points.

Phase transitions and multicritical points in the mixed spin- and spin-2 Ising system with a single-ion anisotropy

“…We note in advance that, for z B ¼ 4, a phase diagram topology with a critical end point and isolated critical point has been obtained in Ref. [5], for a special case of the AB p C 1Àp ternary mixed-spin system with p ¼ 1:0, and therefore is not shown here. However, as z B is increased to the value of z B ¼ 5, the multicritical behaviour of the system is drastically changed.…”