Composition and phase dependence of dielectric activity in [111]-oriented (1−x)Pb(Mg1/3Nb2/3)O3−xPbTiO3 crystals as a function of DC bias

Dielectric permittivity of [111]-oriented Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃(PMN-PT) single crystals with various PT content and phase were investigated as a function of temperature and applied DC electric field. The temperature dependent dielectric permittivity with different PT content showed various dielectric anomalies, revealing different ferroelectric phase at room temperature. The dielectric permittivity-electric field (ε-E) measurement showed that the dielectric permittivity was strongly dependent on the applied electric field and phase structures, where different dielectric anomalies can be observed as a function of DC bias and phase, being inherently associated with the electric field induced domain switching and phase transition.