Published on July 2018 | Materials Science

Effect of Sr doping on the magnetocapacitive effect in Bi0.6Sr0.4FeO3−δ polycrystalline ceramics

Single-phase polycrystalline BiFeO3 and Bi0.6Sr0.4FeO3−δ are prepared by conventional solid-state route. The host BiFeO3 shows rhombohedral phase (R3c) and Bi0.6Sr0.4FeO3−δ, cubic phase (Pm3m). The M–H loop of Bi0.6Sr0.4FeO3−δ exhibits weak magnetization at ambient temperature with saturation magnetization of 5.097 emu/g which is almost two orders larger in magnitude than in BiFeO3 (0.088 emu/g). The temperature-dependent dielectric permittivity of Bi0.6Sr0.4FeO3−δ shows a strong anomaly at 321 °C, a signature of magnetoelectric coupling present in this material and the magnetocapacitance effect is found to be 5.3% at a field of 4 kOe.