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

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 $(\pm 1/2,\pm 1/2,\pm 1)$ and $(\pm 1/2,\pm 1/2,0)$ 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.

arXiv comment16 pages, 9 figures

References in corpus (3)

• Monte Carlo errors with less errors
• Numerical Study of a Mixed Ising Ferrimagnetic System
• Ferrimagnetism and compensation points in a decorated 3D Ising models

Cited by in corpus (4)

• Frustrated mixed spin-1/2 and spin-1 Ising ferrimagnets on a triangular lattice
• Random-anisotropy mixed-spin Ising on a triangular lattice
• Crystalline Field Effects on Magnetic and Thermodynamic properties of a Ferrimagnetic Centered Rectangular Structure
• An alternative order-parameter for non-equilibrium generalized spin models on honeycomb lattices