The defect-induced ferroelectric phase in thin PbZrO3single crystals

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Abstract
In the PbZrO3 crystals a transient phase does not exist spontaneously below Tc, although normal ferroelectric loops can be observed near Tc on both heating and cooling. A strong electric field causes the crystal to be permanently defected. Defects produced in this way are the reason for the appearance of a transient ferroelectric phase. In the virgin crystal, separation of point defects in an external DC electric field induces ferroelectric behaviour below Tc in the internal field of the crystal. It was found that for PbZrO3, Tc depends on sample thickness.