The single phase multiferroic BFO, BDFCO and BDFO were prepared by the sol–gel method [17]. Keeping the Cu concentration at 2%
doping level and Dy concentration at 5%, BDFCO was prepared. For
BDFO, 5% of Dy concentration was included to BFO. Analytical grade
bismuth (III) nitrate pentahydrate (assay 98% Merck)