Abstract

The depolarization effect in a telluric acid ammonium phosphate crystal has been studied by direct imaging of the domain structure by nematic liquid-crystal decoration technique. The stabilization mechanism of 180° domains appears to have a correlation to a defect—induced internal field in the crystal. The internal field acts as a driving field causing nucleation and growth of domains. The strong effect of the poling voltage parameters (duration and amplitude) on the depolarization process is reported.

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