Abstract
Monte Carlo simulations are performed for pure and site-diluted Ising ferro- and ferrimagnets on a simple cubic lattice with up to 403 sites and with impurity concentrationx. For the diluted ferromagnet (x=0.2) the exponentβ= 0.392±0.03 is definitely larger than the pure model value ofβ=0.304±0.03. In contrast, for ferrimagnetic systems (x=0, 0.1, 0.2) theβ values appear to be independent ofx and within the error limits consistent with the value for the pure ferromagnet, possibly because the width of the asymptotic random critical regime (or of the crossover regime) is even smaller than in the case of ferromagnets.
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Braun, P., Fähnle, M. Monte Carlo study of the critical behavior of pure and site-diluted Ising ferro-and ferrimagnets. J Stat Phys 52, 775–794 (1988). https://doi.org/10.1007/BF01019729
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DOI: https://doi.org/10.1007/BF01019729