Dielectric characterization of the BiFe0.5Cr0.5O3 ceramics

E. Palaimiene; V. Gribauskaite; J. Banys; A.V. Pushkarev; Yu.V. Radyush; N.M. Olekhnovich; J.P.V. Cardoso; A.N. Salak

doi:10.3952/physics.v62i4.4815

E. Palaimiene
V. Gribauskaite
J. Banys
A.V. Pushkarev
Yu.V. Radyush
N.M. Olekhnovich
J.P.V. Cardoso
A.N. Salak

DOI: https://doi.org/10.3952/physics.v62i4.4815

Keywords: ceramics, spectroscopy, ferroelectric materials

Abstract

Dielectric properties of the BiFe0.5Cr0.5O3 ceramics synthesized under high pressure were investigated in a broad frequency range (20 Hz – 1 GHz) between 200 and 500 K. It was revealed that the ceramics exhibit electrical conductivity above 300 K. Below 300 K, a dielectric dispersion caused by ferroelectric domains was observed. It was found that the conductivity follows the Almond–West law, which allowed us to determine a DC contribution (σDC). From the σDC values obtained at different temperatures, the activation energy (EA = 0.302 ± 0.006 eV) was calculated using the Arrhenius law.