Monte Carlo studies of the cubic lattice mixed-bond Ising model

In this work, we used the Cluster Wolff algorithms to simulate the dynamics of the system. We obtained the thermodynamic quantities such as magnetization and susceptibility. Critical temperatures were estimated at the maximum of the susceptibility and with these values we made the phase diagram, T-C versus p (the concentration of magnetic bonds) for different a values, being a the competition parameter. Our results were compared to those obtained by using a new technique in the effective field theory which employs similar probability distribution within the framework of two-site clusters. (C) 2007 Published by Elsevier B.V..