Mixed spin-1/2 and spin-1 Ising ferromagnets on a triangular lattice

M. Žukovič and A. Bobák

Physica A: Statistical Mechanics and its Applications, 2015, vol. 436, issue C, 509-518

Abstract: By Monte Carlo simulations we study critical properties of the mixed spin-1/2 and spin-1 Ising model on a triangular lattice, considering two different ways of the spin-value distributions on the three sublattices: (1/2,1/2,1) and (1/2,1,1). In the former case, we find standard Ising universality class phase transitions between paramagnetic and magnetic phases but no phase transitions between two distinct magnetic phases (±1/2,±1/2,±1) and (±1/2,±1/2,0) at any finite temperature, except for some interesting non-critical anomalies displayed by response functions. On the other hand, the latter case turns out to be a rare (or perhaps the only) example of a two-dimensional mixed spin-1/2 and spin-1 Ising model on a standard lattice that displays tricritical behavior.

Keywords: Mixed-spin Ising model; Triangular lattice; Monte Carlo simulation; Tricritical point (search for similar items in EconPapers)
Date: 2015
References: View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:436:y:2015:i:c:p:509-518

DOI: 10.1016/j.physa.2015.05.077

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