Hysteresis properties of PIN-PMN-PT single-crystal solid solutions

Abstract

The paper presents the results of a study of hysteresis properties based on analysis of dielectric hysteresis loops and temperature dependences of switchable polarization for solid solutions 24% Pb(In1/2Nb1/2)O3 – 49% Pb(Mg1/3Nb2/3)O3 – 27% PbTiO3 solutions. It follows from the experiment that at T = 293 K and strengths of the repolarizing field E = (140-301)·103 V·m-1, only partial switching of the crystal occurs. Saturated dielectric hysteresis loops of crystals are observed in a field of 271103 Vm-1 in two temperature ranges 373-383 K and 437-440 K. The temperature dependences of the permittivity and switchable polarization have two anomalies, the first of which correspond to the region of the phase transition of the crystal from the ferroelectric rhombohedral phase to the tetragonal one. At a temperature of about 450 K, the crystal passes into the paraelectric state. Electron microscopic studies of the PIN-PMN-PT crystal structure show that various surface areas contain inhomogeneities that differ in the compositional contrast from the matrix represented by chemical elements, the main mass percentage of which is oxygen and lead. The elemental composition of heterogeneities also includes titanium.

Keywords

• single crystal solid solution
• hysteresis
• switching processes
• permittivity
• phase transition