Influence of Dual Cationic Substitution on the Structural and Optical Behavior of Nano-FerritesPankaj Kumar Bhamu, Neha Sain, Shobha Ram Choudhary, S.N. Dolia, P. A. Alvi and B. L. ChoudharyEPJ Web Conf., 356 (2026) 01003DOI: https://doi.org/10.1051/epjconf/202635601003