The Lifshitz-Slyozov theory of the late stages of diffusion-limited spinodal decomposition (Ostwald ripening) is generalized to apply for arbitrary volume fractions of the two phases. Corrections to the asymptotic R(t)∼$t^{1/3}$ scaling are considered; they are due to excess transport in interfaces and are therefore of relative order $R^{\mathrm{-}1}$(t), where R(t) is the average domain size. That the asymptotic exponent (1/3) has not been observed in Monte Carlo simulations of Ising models can be attributed to such corrections. Further simulations of the square-lattice Ising model are performed: The results are consistent with the generalization of the Lifshitz-Slyozov theory. The recent work of Mazenko et al. that proposes instead R(t)∼logt is criticized.

• Received 18 November 1985

DOI:https://doi.org/10.1103/PhysRevB.34.7845