Phase diagrams of the triangular Ising antiferromagnet-variational approximations
- 1 October 1981
- journal article
- Published by IOP Publishing in Journal of Physics A: General Physics
- Vol. 14 (10) , 2767-2777
- https://doi.org/10.1088/0305-4470/14/10/028
Abstract
Derives an appropriate generalisation of Baxter's variational method and define a sequence of variational approximations for 'antiferromagnetic' models on the triangular lattice. Expressions for the sublattice magnetisations are derived from a variational principle for the partition function per site. He applies the method to the triangular antiferromagnet and obtains approximate phase diagrams in the temperature-field and temperature-magnetisation (density) planes.Keywords
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