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Field-driven interface dynamics of a random soft-spin Ising model

1993; Institute of Physics; Volume: 26; Issue: 8 Linguagem: Inglês

10.1088/0305-4470/26/8/008

1361-6447

K. D. Usadel, Matej Jošt,

Opinion Dynamics and Social Influence

The kinetics of an interface between spin-up and spin-down domains in a soft-spin Ising model with quenched random fields and driving magnetic field H is studied numerically within a discrete time dynamics at zero temperature. Spins are updated in parallel starting from a flat interface. It is found that for fields smaller than a threshold field Hc the interface is pinned while above Hc the mean velocity of the interface increases proportional to (H-Hc) for two- and three-dimensional systems.