Electroelastic study of the relaxor–normal phase transition in PFW–PT solid solution

Relaxor–normal transition in ferroelectric materials have been extensively studied through their optical and dielectric properties. However, only few reports concerning simultaneously elastic and dielectric characterization were presented. In this work, multiferroic ceramic solid solutions between the ferroelectric relaxor Pb(Fe2/3W1/3)O3 (PFW) and “normal” ferroelectric PbTiO3 (PT) [PFW–PT] have been synthesized by a modified B-site precursor method and investigated by the ultrasonic pulse echo technique and dielectric measurements, as a function of the frequency and temperature. The nature of the phase transition was characterized through the diffusivity exponent obtained from both measurements. Additionally, an interplay between ferroelectric and ferromagnetic properties of the samples, as well as the influence of the proximity of the temperatures of the establishment of both orderings with electroelastic coupling coefficient was represented.