Improving of Electric Voltage Response Based on Improving of Electrical Properties for Multiferroic Material of BiFeO₃-BaTiO₃ System

Abstract

Synthesis of nanomultiferroic material with the active content of bismuth ferrite (BiFeO3) and barium titanate (BaTiO3) was carried out. It is considering that it was difficult to obtain single phase of BiFeO3 as a base material for multiferroic materials. It is expected that the addition of BaTiO3 on ceramic alloys consist of BiFeO3 and BaTiO3 can improve the electrical properties of the ceramics and finally it improves the multiferroic properties of the material. Multiferroic properties could be seen from the appearance of an electric voltage response if the material is given the effect of an external magnetic field. The synthesis uses the sol gel method which is a good method of producing nanosized material. Synthesis of nanomultiferroic ceramic materials is carried out by varying the weight ratio of BaTiO3 and BiFeO3 of 2: 1, calcination temperature of 350°C for 4 hours and sintering temperatures with variations of 700°C; 750°C and 800°C for 2; 4; and 6 hours. Characterization was carried out using X Ray Diffraction (XRD) to confirm phase formation. The electrical properties test which produces a hysterical loop is carried out to determine the value of remanent, coercivity and electric polarization saturation. Particle size measurements were carried out using the Beckman Coulter DelsaTM nanoinstrument. The multiferroic phenomena is known from the appearance of an electric voltage response if there is an effect of an external magnetic field on the material. The smallest particle size was obtained on ceramic powder which experienced sintered of 750°C. The best values of remanent, coercivity and electric polarization​​ were obtained on ceramics which were sintered at temperatures of 750°C for 6 hours. This is linear with the highest value of electrical voltage arising as a result of the effect of the external magnetic field given to the ceramic material. Material that has a large electrical voltage response shows good multiferroic properties.