Room-temperature magnetic control of ferroelectric polarization and enhanced ferromagnetic properties in 0.8BiFeO3-BaTiO3 ceramic

A multiferroic 0.8BiFeO₃ ??0.2BaTiO₃ (0.8BF-BaT) ceramic was prepared by solid-state reaction to study the magnetic control of its ferroelectric polarization and ferromagnetic properties. The influence of the magnetic field H on the ferroelectric polarization of 0.8BF-BaT ceramic was investigated. The maximum displacement current density Jm and the remanent polarization Pr of 0.8BF-BaT increased by 35% and 20% respectively after it being magnetized, indicating that the polarization was suppressed in the magnetic domain walls. Under a magnetic field of H?=?0.7?T, Jm and Pr decreased by 6.1% and 6.4% respectively, revealing coupling between polarization P and magnetic field H. The magnetic properties of BiFeO₃ were improved by introducing of BaTiO₃ and the magnetic Néel temperature T_N increased by 70?K because of structural effects.