Y. LaosiritawornJ. PoulterJ. B. StauntonChiang Mai UniversityMahidol UniversityThe University of Warwick2018-07-242018-07-242004-09-01Physical Review B - Condensed Matter and Materials Physics. Vol.70, No.10 (2004)016318292-s2.0-19744381510https://repository.li.mahidol.ac.th/handle/20.500.14594/21818We have used Monte Carlo simulations and mean-field analysis to observe the magnetic behavior of Ising thin films with cubic lattice structures as a function of temperature and thickness, especially in the critical region. Magnetization and magnetic susceptibility, including layer variation, are investigated. We find that the magnetic behavior changes from two-dimensional to three-dimensional character with increasing film thickness. Both the crossover of the critical temperature from a two-dimensional to a bulk value and the shift exponent are observed. Nevertheless, with support from a scaling function, the simulations show that the effective critical exponents for films with large enough layer extents only vary a little from their two-dimensional values. This, in particular, provides an indication of two-dimensional universality in the thin films.Mahidol UniversityPhysics and AstronomyArticleSCOPUS10.1103/PhysRevB.70.104413