Near-room temperature relaxor multiferroic

Abstract

We report the fabrication and characterization of highly oriented Pb (Zr0.53Ti0.47)0.60(Fe0.5Ta 0.5)0.40O3 thin films. Dielectric spectra showed a maximum (Tm) around 350 K for 1 kHz that shifted to higher temperatures (by ∼30 K) with an increase in frequency up to 1 MHz. High dielectric dispersion below and above Tm, low dielectric loss (2%-5%), high dielectric constant (∼1380@1 kHz), ferroelectric polarization, and weak magnetic moment are observed. Real and imaginary dielectric data were fitted with a nonlinear Vogel-Fulcher equation, implying a relaxor nature. The ac conductivity shows frequency-dependent conductivity, low loss, and frequency-dependent kinks near Tm. © 2010 American Institute of Physics.