KINETIC ISING-MODEL IN AN OSCILLATING FIELD - FINITE-SIZE-SCALING AT THE DYNAMIC PHASE-TRANSITION

We study hysteresis for a two-dimensional spin-1/2 nearest-neighbor ki netic Ising ferromagnet in an oscillating field using Monte Carlo simu lations. The period-averaged magnetization is the order parameter for a proposed dynamic phase transition (DPT). To quantify the nature of t his transition, we present the first finite-size scaling study of the DPT for this model. Evidence of a diverging correlation length is give n, and we provide estimates of the transition frequency and the critic al indices beta, gamma, and nu. [S0031-9007(98)06701-5].