Abstract
Abstract We present a model of ferroelectric switching which describes domain growth in crystals composed of a large number of relatively small grains. If the grain boundaries stop or significantly affect domain wall motion then the observed switching transients will deviate from those predicted by the infinite grain model of Ishibashi and Takagi. The model assumes a constant nucleation rate throughout the switching process and constant domain wall velocity. At a characteristic time dependent only on the size of the grains and the domain wall velocity the switching current transient changes from its early-time infinite-grain behavior to an exponential decay. The results are compared with Monte Carlo simulations of switching in the two-dimensional Ising model.
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