Analysis of the switching process in triglycine sulphate crystals based onthe Avrami model

By analysing switching current data i (t), produced by the reversal of doma ins, it was possible to extract detailed information concerning the behavio ur of the switching kinetics in TGS crystals. The switching curves were fit ted to a three-parameter nucleation and growth model based on Avrami statis tical theory. By direct observation of the domain pattern during slow polar ization reversal, by means of nematic liquid crystals, it was possible to v erify the assumptions of the theory for crystal samples with both a spatial ly uniform and non-uniform distribution of domain nuclei.