The region of the (0.9-x)Pb(Zn1/3Nb2/3)O3-0.1BaTiO3-xPbTiO3 (0.0⩽x⩽0.2) phase diagram was established through analysis of the structure and dielectric behavior associated with changes in temperature and composition. The zero-field spontaneous and field-induced relaxor-normal ferroelectric transitions are reported in this ferroelectric system, and this transition corresponds to the rhombohedral-tetragonal first-order phase switching. From careful measurement of the hystersis loop, it is suggested that the microscopic mechanism of spontaneous polarization of the ferroelectric microregion was further correlated with the phase structure. Thus, the thermal hysteresis of micro–macrodomain transition of relaxor ferroelectrics can be explained very well.
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Fan et al. (1998) studied this question.
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