Stability Surface for the Blume‐Capel Model
G. Bruce Taggart · physica status solidi (b) · 1981
Abstract The stability surface for the Blume‐Capel model is obtained in the thermodynamic space of the temperature and densities (order parameters). This surface, which separates thermodynamically stable (metastable) regions from unstable ones, is determined from divergences in the generalized static susceptibility. The susceptibility itself is derived from correlation functions which are calculated from high temperature expansions to the first order beyond the mean field approximation. Consequently the stability surface exhibits lattice‐dependent effects.