Study of structural, optical and electrical properties of La3+doped Mg0.25 Ni0.15 Cu0.25 Co0.35 Fe2-x Lax O4 spinel ferrites

Lanthanum substituted Mg–Ni–Cu–Co ferrite nanoparticles prepared through the Sol-Gel method were studied using different methods such as XRD, FTIR, UV-VIS, SEM, Raman, LCR, EDX and IV to evaluate structural, optical electrical properties. The single-phase cubic spinel structure of samples was confirmed from X-ray diffraction analysis. FT-IR spectra indicated two absorption bands, ?1 ?2 that represent complex Fe3+–O2? at A-site (tetrahedral) B-site (octahedral) vibration. band gap decreased 2.48eV 1.53eV observed by UV–Vis, matched with resistivity measurements. Variation in lattice parameters energy UV–vis data DC demonstrated change electric properties ferrites due addition rare earth element La3+. Both dielectric losses constant La3+ ions doping, A.C conductivity increased increasing value frequency 8 Hz M Hz. variation Raman peaks reveals shift varied addition. stoichiometric calculations La3+ions into nanoparticles.