Tricritical behaviour in an Ising system and the Potts model

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, , Citation R V Ditzian and J Oitmaa 1974 J. Phys. A: Math. Nucl. Gen. 7 L61 DOI 10.1088/0305-4470/7/5/002

0301-0015/7/5/L61

Abstract

The susceptibility of the Ising S=1 model with biquadratic interactions is expanded in a high temperature series on the FCC lattice for a range of the biquadratic interaction parameter that includes the Potts model (1952). A tricritical point and a point above which the magnetization M remains zero are approximately located. The Potts model seems to fall in the region of the first-order phase transition in M.

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10.1088/0305-4470/7/5/002