Phys. Rev. B 77, 094437 (2008) [7 pages]Dynamics of Ising models with dampingReceived 30 August 2007; published 28 March 2008 We show for the Ising model that it is possible to construct a discrete time stochastic model analogous to the Langevin equation that incorporates an arbitrary amount of damping. It is shown to give the correct equilibrium statistics and is then used to investigate nonequilibrium phenomena, in particular, magnetic avalanches. The value of damping can greatly alter the shape of hysteresis loops, and for small damping and high disorder, the morphology of large avalanches can be drastically affected. Small damping also alters the size distribution of avalanches at criticality. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.77.094437
DOI:
10.1103/PhysRevB.77.094437
PACS:
75.40.Mg, 75.60.Ej, 05.45.Jn
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