A number of problems which beset the finite-spin Heisenberg antiferromagnet are eliminated by considering the infinite-spin, or classical case. Using a simple spin-wave treatment, the temperature dependence of the sublattice magnetization is found up to the leading effect due to spin-wave interactions. These new results are quite different from the finite-spin case but very similar to the magnetization of the classical ferromagnet.
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Loly et al. (1970) studied this question.
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