Structural, electrical and magneto-electric characteristics of double perovskite: BiCaFeCeO6

Abstract

A double perovskite sample of (Ca, Ce) modified bismuth ferrite (i.e., BiCaFeCeO6) has been synthesized by a solid state reaction method. A single-phase characteristic of the material was carried out by analyzing basic X-ray crystal structure. The micrograph of the sintered sample was recorded at room temperature by using scanning electron microscope. The image of the micrograph shows the homogeneous distribution of with different grain size and shape. It shows that a high-density sample can be fabricated in the above experimental condition. This prepared complex electronic system (BiCaFeCeO6) exhibits multiferroic characteristics that has experimentally been supported by detailed analysis of capacitive, impedance, magnetic and other related behavior of the material Attempts have been made to study the (a) effect of microstructures containing grains, grain boundaries and electrodes in impedance and capacitive characteristics, (b) relationship between properties and crystal structure and (c) nature of relaxation mechanism of the prepared samples. Detailed impedance analysis with experimental data, collected at different frequency (103–106 Hz) and temperatures, has provided many important characteristics of the material. The variation of conductivity in alternating current of the material at different temperatures follows Jonsher's universal power law. Some multiferroic characteristics (dielectric constant, tangent loss, conductivity, magneto-electric) of bismuth ferrite have been tailored (decrease/increase) by multiple doping of (Ca, Ce) which will be useful to explore the possibility for applications.