Magnetic and ferroelectric properties of Ni doped BaTiO3

• Structural phase of BaTiO3 is transformation from tetragonal to hexagonal by Ni ions doping.
• Magnetism is enhanced by Ni doping.
• Shape of ferroelectric hysteresis loop as well as saturation polarization value is significantly influenced by Ni doping.

Our paper reports structural, magnetic and ferroelectric properties of Ni doped barium titanate. Ceramics samples of BaTi1−xNixO3 (here, x=0, 0.05, 0.1, and 0.15) were prepared through solid state sintering technique. It is revealed from structural studies that the phase transformation from tetragonal to hexagonal phase is strongly influenced by Ni doping concentration. Magnetism is induced in doped composition and the value of magnetism is dependent upon Ni ion concentration. This enhanced magnetic effect is likely to originate from carrier-mediated exchange interactions. Ferroelectricity was observed in all samples at room temperature, but it was decreased by Ni doping.