Investigation of structural, optical, and electrical properties of LiMg2Fe3O7 spinel ferrite

The L i Mg 2 Fe 3 O 7 compounds were prepared by via the citrate process and sintered at two different temperatures to study their effect on structural, morphological, optical, and electric properties. The X-ray diffraction analysis revealed that both samples crystallized in a cubic spinel structure belonging to space group F d 3 ¯ m . Increasing the sintering temperature led to an increase in the grain size as characterized by SEM. The UV–visible spectroscopy revealed that the band gap is 2.5 eV and 2.35 eV for M g 700 and M g 1100 , respectively, which confirm that these compounds are potential candidates for optoelectronics. The electrical resistance was found to decrease with the increase in the sintering temperature, consequently leading to a rise in conductivity.