Low-temperature scaling behavior of BaFe 0.5 Nb 0.5 O 3

摘要: The ferroelectric ceramic ${\mathrm{BaFe}}_{0.5}{\mathrm{Nb}}_{0.5}{\mathrm{O}}_{3}$ (BFN) is synthesized by a solid-state reaction technique. x-ray-diffraction of the sample at room temperature shows monoclinic phase. field dependences dielectric response and conductivity are measured in frequency range from 10 Hz to 2 MHz 93 213 K. dependence loss peak found obey an Arrhenius law with activation energy 0.12 eV. An analysis real imaginary parts permittivity performed, assuming distribution relaxation times as confirmed Cole-Cole plots well scaling behavior loss. spectra suggests that independent. frequency-dependent electrical data also analyzed framework modulus formalisms. Both these formalisms provided qualitative similarities times. We observe hopping can be used for BFN. All observations clearly suggest BFN relaxor ferroelectric.