Nonequilibrium relaxation study on spin glass model

Ferromagnetic (FM) transition point and universality class of the +/-J Ising model on cubic lattice are studied by computer simulation using the nonequilibrium relaxation (NER) method. At FM bond density p between multicritical one p(me) and 1, static exponents take universal values which are different from those of p = 1 or p = p(me), and they are consistent with the values of the random-fixed point and of the simulations and experiment,, for diluted Ising systems. The dynamical exponent. however. seems to depend on p and not to be universal, although it may be due to finite-time correction. The estimation of p(me) on square lattice is also refined to be 0.8894(9). which is consistent with the Nishimori and Nemoto's conjecture. 0.889972 . . . (C) 2002 Elsevier Science B.V. All rights reserved.