Near-room temperature relaxor multiferroic

We report the fabrication and characterization of highly oriented Pb(Zr0.53Ti0.47)(0.60)(Fe0.5Ta0.5)(0.40)O-3 thin films. Dielectric spectra showed a maximum (T-m) around 350 K for 1 kHz that shifted to higher temperatures (by similar to 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 (similar to 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 T-m. (C) 2010 American Institute of Physics. [doi:10.1063/1.3519979]