Effect of non-magnetic doping on leakage and magnetic properties of BiFeO3 thin films

► The leakage properties of BiFeO3 (BFO) films are greatly improved by Zr-doping. ► The magnetic properties of Zr-BFO films are affected as a weak ferromagnetism. ► A model is proposed to explain the origin of ferromagnetism in Zr-BFO films.