On the high temperature staggered susceptibility of Heisenberg model antiferromagnetics

Abstract

The critical ordering temperature, T c′, for the antiferromagnetic Heisenberg model is investigated on the basis of the high temperature expansion for the staggered susceptibility. For the simple cubic and body-centred cubic lattices, it appears that where q is the lattice coordination number, S the spin value and T c the corre-sponding ferromagnetic Curie point. A possible counter argument asserting T c′ ⩽ T c is discussed at some length.