Reitveld refinement, structural, optical band gap and low-temperature magnetic characterization of Gd3+ doped spinel cubic CoFe2O4 nanoparticles

The current study unravels the structural, optical band gap and magnetic characteristics of rare-earth (RE) gadolinium (Gd) substituted CoGdxFe2-xO4 (x= 0.00 - 0.10, in interval 0.02) nanocrystallites synthesized by sol-gel self-ignition route. XRD analysis Rietveld refinement confirmed existence a single cubic phase with crystallite size ~15-21 nm range, further HRTEM results. SEM images well-known nano-size morphology for all samples. magnetization measurements show hard ferromagnetic nature specimens within temperature range 20-300K. Coercivity, remanent, saturation monotonically increased reduction from 300K to 20K. UV-Vis absorbance results that energy CoFe2O4 nanoparticles (NPs) decreases increasing Gd3+ ion doping have values 2.47, 2.15, 2,02, 2.00, 1.43 1.95 eV x= 0.00, 0.02, 0.04, 0.06, 0.08, respectively nanoferrites. present reveals properties could be altered monitoring quantity cobalt nanoferrites.
 Bangladesh J. Sci. Ind. Res. 57(3), 173-186, 2022