Critical behaviour of a heat capacity for three-dimensional Ising model

We investigated the behavior of a heat capacity near the critical temperature for the three-dimensional Ising model on a cubic lattice with the linear lattice size ranging from 10 to 256. The calculations were carried out by Metropolis and Wang-Landau algorithms. We find that the results obtained by both methods have a good agreement and they justify that the heat capacity has an infinite singularity at the critical point.