Ni doping dependent dielectric, leakage, ferroelectric and magnetic properties in Bi7Fe3−xNixTi3O21 thin films

Abstract Bi 7 Fe 3−x Ni x Ti 3 O 21 thin films were prepared by chemical solution deposition on Pt/Ti/SiO 2 /Si substrates. The Ni doping effects on the dielectric, leakage, ferroelectric and magnetic properties were investigated. Coexistence of ferroelectric and ferromagnetic properties at room-temperature was observed in the Bi 7 Fe 2 NiTi 3 O 21 thin film with a remnant polarization 2P r of 36.4 μC/cm 2 and a remnant magnetization 2M r of 3.9 emu/cm 3 . The dielectric and leakage properties were discussed in detailed. The results will provide important information to explore single-phase multiferroic materials.