Abstract
Monte Carlo simulations are performed for pure and site-diluted Ising antiferromagnets on a simple cubic lattice with up to 403 sites and impurity concentrationx=0, 0.2. and 0.5. Forx=0.5 a cusp emerges for the temperature dependence of the uniform susceptibility at the critical temperature which is contrasted with the smooth behavior for a pure antiferromagnet, in agreement with the theoretical prediction of Fishman and Aharony.
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Braun, P., Staaden, U. & Fähnle, M. Monte Carlo evidence for a cusp in the uniform susceptibility of the site-diluted simple cubic Ising antiferromagnet. J Stat Phys 57, 411–414 (1989). https://doi.org/10.1007/BF01023654
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DOI: https://doi.org/10.1007/BF01023654