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Abstract
The Kolmogorov-Avrami approach modified for polarization reversal in finite media has been proposed for analysis of the switching current data in real systems. It has been verified by computer simulation that for adequate fitting of the experimental data the switching process must be separated into several stages distinguished by nucleation type and growth dimensionality. The abrupt transition between stages (“geometrical catastrophe”) corresponds to distinct change in domain structure geometry. The examples of the stage sequences for switching in elongated sample, for formation of maze structure, and for spatially inhomogeneous nucleation have been considered both experimentally and by computer simulation.
Acknowledgements
The equipment of the Ural Center for Shared Use “Modern Nanotechnology”, Ural Federal University has been used. The research was made possible in part by RFBR and the Government of Sverdlovsk region (Grant 13-02-96041-r-Ural-a) by RFBR (Grants 11-02-91066-CNRS-a, 13-02-01391-a), by Ministry of Education and Science (Contract 14.513.12.0006).