Relevance of domain-wall softness for a universal classification of domain-growth kinetics

The influence of domain-wall softness on the kinetics of growth is studied within a two-dimensional microscopic model which supports domain walls of variable softness. The domain radius grows with time as R(t) tn, where the kinetic exponent is found to assume a value, n 0.25, which is independent of the degree of softness. This suggests a dual universal classification of domain-growth kinetics into classes of systems with soft and hard walls.