Pseudolinearity in the inverse dielectric susceptibility of poled Pb(Mg1/3Nb2/3)O3–PbTiO3 crystals

Abstract

For poled oriented 0.67Pb(Mg1/3Nb2/3)O3–0.33PbTiO3 single crystals, dielectric measurements have revealed pseudolinear (Curie–Weiss) behavior for temperatures below a phase transition; however, significant deviations are observed in the paraelectric phase. The value of the Curie constant (C) in the poled polydomain condition was found to be significantly larger than that in a poled monodomain condition. It is believed that polarization heterogeneity exists within the poled polydomain condition.