Dielectric behavior and ac conductivity in Aurivillius Bi4Ti3O12 doped by antiferromagnetic BiFeO3

Abstract Bi 5 Ti 3 FeO 15 ceramics were synthesized by the solid state reaction. XRD analysis shows a single phase perovskite structure with no impurities identified. Two obvious dielectric anomalies around 1007 and 1090 K were exhibited by this material, indicating that there are two phase transitions. While no peak was found in the tan δ – T curve. In addition, the conduction loss activation energies calculated at 476–639 K, 652–966 K, and 980–1095 K are 0.156, 0.262, and 0.707 eV, respectively. Polarization versus electric field hysteresis loops associated with 2 P r of 6.08 μC/cm 2 and 2 E c of 59 kV/cm were obtained.