Influence of Ce3+ and La3+ Substitution on Structural & Optical Parameters and Electrical Behavior on Mg-Zn Ferrites Synthesized via Co-precipitation method

The nanoparticle spinel ferrites Mg0.5Zn0.5CexLaxFe2-2xO4 (x = 0.0, 0.0125, 0.025, 0.0375, 0.05) were synthesized by mean of co-precipitation method. These magnetic nanoparticles were sintered at 750 degrees C for 8 h. XRD patterns confirmed the formation of the cubic spinel structure of prepared nanoparticles. The lattice constant of nanoparticle ferrites increased, while crystallite size decreased with doping content (x). Pure ferrite sample has an optical bandgap of 2.61 eV, and it increases from 1.73 to 2.17 eV as concentration (x) is changed from 0.0125 to 0.05. The electrical dc resistivity is of the order of 10(10) omega cm for doping content (x) from 0 to 0.0375 and has a maximum value of 5.48617 x 10(12) omega cm for content x = 0.05. The Curie temperature (T-c) decreased 433-373 K as concentration (x) was increased. The dielectric constant, dielectric loss, and impedance are reduced with the increase of frequency. The dielectric constant, as well as the dielectric loss diminished while impedance increased as doping of cerium and lanthanum, was increased.

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In this study, CexLaxFe2-2xO4 nanoparticles were synthesized and the changes in structure and properties were investigated by varying the doping content. The experimental results confirmed that the doping content affected the lattice constant, crystallite size, optical bandgap, electrical resistivity, Curie temperature, and dielectric constant, among other parameters.