Optical, impedance, and relaxation response of Fe3+ doped double perovskite solid solutionLutu Sahoo, Bichitra Nanda Parida, Nimai Charana Nayak and Rajanikanta ParidaEur. Phys. J. Appl. Phys., 98 (2023) 47DOI: https://doi.org/10.1051/epjap/2023220286