Structural, dielectric and magnetic properties of Mn modified xBiFeO3-(1−x)BaTiO3 ceramics

Manganese doped xBiFeO3-(1−x)BaTiO3(x=0.67-0.82) ceramics were prepared by solid-state method. The structural, dielectric and magnetic properties were investigated after annealing in vacuum at 773 K. X-ray diffraction analysis indicated that all samples crystallized in pure perovskite structure. The ceramics displays a typical ferroelectric loop, with a max remnant polarization Pr of 25.6 µC/cm2. The piezoelectric coefficient d33 of Manganese doped 0.67BiFeO30.33BaTiO3 is 139 pC/N and its temperature dependence of dielectric constant exhibits a broad anomaly. The Manganese doped 0.75BiFeO30.25BaTiO3 ceramic shows ferrimagnetism at room temperature, with remnant magnetization Mr of 0.31 emu/g and ferrimagnetic transition temperature TN of ~420 °C.