Abstract
Simulation of critical relaxation of the magnetization in a three-dimensional Ising model diluted by quenched nonmagnetic impurity atoms is carried out. The cubic systems with linear size L = 144 and spin concentrations p = 0.95, 0.8, 0.6, and 0.5 are studied. The dynamical critical exponent z is determined by the Monte Carlo method combined with the dynamical renormalization group method. The obtained results are: z(p): z(0.95) = 2.19 ± 0.07, z(0.8) = 2.29 ± 0.06, z(0.6) = 2.72 ± 0.08, and z(0.5) = 2.75 ± 0.08.
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