Abstract
An anisotropic antiferromagnetic model on a triangular lattice with competing interactions is investigated by the cluster transfer-matrix method. A phase diagram with ferrimagnetic, incommensurate, and disordered phases is found. Three order parameters are introduced. At commensurate-incommensurate and incommensurate-disorder phase transition lines two of them change in continuous and one in discontinuous way.
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Pajerský, P., Šurda, A. Incommensurate-commensurate phase transitions in an anisotropic antiferromagnetic model on triangular lattice. J Stat Phys 76, 1467–1477 (1994). https://doi.org/10.1007/BF02187071
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DOI: https://doi.org/10.1007/BF02187071