Dielectric properties of Pb(Fe1/2Ta1/2)O3 ceramics over 70–300 K temperature range

  • K. Bormanis
  • A. Kalvane
  • A.I. Burkhanov
  • A.M. Serezhkin
Keywords: ferroelectrics, ceramics, ferrotantalate, dielectric properties, polarization


The studies of dielectric response in ferromagnetic lead ferrotantalate Pb(Fe1/2Ta1/2)O3 are reported over a wide range of temperature under the applied bias field. The features of dielectric nonlinearity deduced from behaviour of reverse ε'(E=) curves at different temperatures, including regions of ferroelectric phase transition and vicinity of the Néel point, are examined. Obtained results indicate a substantial broadening of the ferroelectric phase transition. The results are discussed with respect to effects of ferroelectric ordering in relaxor materials of such kind.
Ferroelectrics and Superconductors