Improved Ferroelectric and Ferromagnetic Properties of 1 − xBiFeO3-xBaTiO3 Ceramics

Abstract

This paper introduces the solid-phase preparation of bismuth ferrite-based multiferroic ceramics (1 − x BiFeO3-x BaTiO3). After the Ba and Ti doping, it can be observed from the XRD pattern that the crystal structure of the sample changes obviously. From the picture obtained from the SEM test, the grain size of the doped samples was significantly reduced. Pure BiFeO3 (BFO) showed a large leakage current, and in the leakage current test, we found that the leakage current of Ba, Ti-doped samples decreased significantly, which may be related to doping, leading to oxygen vacancy reduction. From the magnetization hysteresis loops, we can see that the ferromagnetism of the doped samples was significantly improved compared to pure BFO, because Ba, Ti doping destroys the G-type antiferromagnetic sequence of pure BFO, thereby enhancing the ferromagnetic properties.