Electrical properties of xNiFe2O4 + (1 − x)Ba0.7Sr0.3TiO3 composites

The standard double sintering ceramic method was used to prepare the magnetoelectric (ME) composites with ferrite and ferroelectric phases. The crystalline phases of the sintered samples were studied by the X-ray diffraction technique. The dielectric parameter such as dielectric constant was determined as a function of frequency (in the range 100 Hz–1 MHz) and temperature (room temperature to 650 °C) at different test frequencies. The DC resistivity as a function of temperature and AC conductivity as a function of frequency were studied for different compositions. Effect of resistivity on ME voltage coefficient is explained.