Blume-emery-griffiths model for thin films of stacked triangular lattices

This paper investigates the use of the Blume-Emery-Griffiths (BEG) model to study the physical and magnetic properties of thin films. The BEG model consists of a system with three states per spin as described using Hamiltonian method. Bilinear exchange interaction, quadratic exchange interaction, and single ion anisotropy are taken into account in the Hamiltonian model. Monte Carlo simulation is also performed to show that there exists a critical value of single ion anisotropy which determine the order of magnetic transition. An Ising-like model is observed in the absence of anisotropy. The effects of surface interaction are also discussed.