Local aging phenomena close to magnetic surfaces

Abstract

Surface aging phenomena are discussed for semi-infinite systems prepared in a fully disordered initial state and then quenched to or below the critical point. Besides solving exactly the semi-infinite Ising model in the limit of large dimensions, we also present results of an extensive numerical study of the nonequilibrium dynamical behavior of the two-dimensional semi-infinite Ising model undergoing coarsening. The studied models reveal a simple aging behavior where some of the nonequilibrium surface exponents take on values that differ from their bulk counterparts. For the two-dimensional semi-infinite Ising model we find that the exponent $b_1$, that describes the scaling behavior of the surface autocorrelation, vanishes. These simulations also reveal the existence of strong finite-time corrections that to some extent mask the leading scaling behavior of the studied two-time quantities.

16 pages, 3 figures, accepted for publication in Physical Review B

References in corpus (3)

• Local scale-invariance and ageing in noisy systems
• Two-time autocorrelation function in phase-ordering kinetics from local scale-invariance
• Scaling of the linear response in simple ageing systems without disorder