3 years ago

Stochastic multi-step polarization switching in ferroelectrics.

R. Khachaturyan, A. Ossipov, J. Schultheiss, J. Koruza, Y.A. Genenko, J. E. Daniels

Consecutive stochastic 90{\deg} polarization switching events, clearly resolved in recent experiments, are described by a new nucleation and growth multi-step model. It extends the classical Kolmogorov-Avrami-Ishibashi approach and includes possible consecutive 90{\deg}- and parallel 180{\deg}-switching events. The model predicts the results of simultaneous time-resolved macroscopic measurements of polarization and strain, performed on a tetragonal Pb(Zr,Ti)O3 ceramic in a wide range of electric fields over a time domain of five orders of the magnitude. It allows the determination of the fractions of individual switching processes, their characteristic switching times, activation fields, and respective Avrami indices.

Publisher URL: http://arxiv.org/abs/1801.02877

DOI: arXiv:1801.02877v1

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