Effect of Ba and Y co-doping on the structural and magneto-electric properties of BiFeO3 ceramic

Abstract

Barium (Ba) doping at Bismuth (Bi) site is reported to enhance magnetic properties of Bismuth Ferrite (BiFeO3) while Yttrium (Y) doping at the same is found to improve ferroelectric and dielectric properties. To investigate the combined effect of Ba and Y co-doping, Ba0.1Bi0.9-xYxFeO3 (x = 0.0, 0.1 and 0.2) are synthesized using chemical synthesis route and their magnetoelectric and dielectric properties are studied in detail. The X-Ray Diffraction study confirms the single phase nature of the synthesized samples. The ferroelectric property is enhanced for x = 0.1 while the magnetic studies show enhanced magnetisation for both co-doped samples with highest enhancement in x = 0.1. The doped samples exhibit a first order field induced metamagnetic transition. The dielectric constant also increases with reduced tangent loss and conductivity for x = 0.1. Therefore, co-doping with Ba and Y improves the magnetoelectric and dielectric property of BiFeO3.