%0 Journal Article %A Nitika %A Anu Rana %A Vinod Kumar %T Study of magnetic and optical transitions in MFe$_2$O$_4$ (M = Co, Zn, Fe, Mn) with spinel structure %J Nanosistemy: fizika, himiâ, matematika %D 2021 %P 481-491 %V 12 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/NANO_2021_12_4_a9/ %G en %F NANO_2021_12_4_a9