Kinetics of reorientation ferroelectric polarisation in PZT bulk ceramics and thin films

Abstract The spontaneous polarisation in ferroelectric materials can be switched by high electric fields. Several results have shown that switching behaviour in polycrystalline ferroelectrics is dependent of parameters as grain size, sample thickness and domain structure. This work presents a comparative study on the electric field dependence of the switching kinetics in PZT ceramics and thin films. The investigations were done through measurements of current transient and ferroelectric hysteresis. The participation of each mechanism present at the switching polarisation process was investigated and the results are discussed in terms of the domain contribution and the grain size influence on the domain configuration.

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