Temperature dependence of domain kinetics in two dimensions

Monte Carlo simulations have been carried out to study the effect of temperature on the growth kinetics of a circular grain. As predicted by d=3 theories of domain kinetics, the circular domain shrinks linearly with time as A(t)=A0-αt, where A0 and A(t) are the initial and instantaneous areas, respectively. However, in contrast to d=3, the slope α is strongly temperature dependent for T>~0.6Tc. An analytical theory which considers the thermal fluctuations agrees with the T dependence of the Monte Carlo data in this regime. © 1982 The American Physical Society.