Synthesis of Nickel-Zinc Ferrite Nanoparticles by the Sol-Gel Auto-Combustion Method: Study of Crystal Structural, Cation Distribution, and Magnetic Properties

Spinel ferrite nanocomposites of Ni1–xZnxFe2O4 (x = 0.25 and 0.75) were synthesized by sol-gel auto-combustion annealed between 250°C 1000°C. A single-phase spinel structure was found through X-ray diffraction (XRD). The crystallite size is in the range 17.55–66.98 nm, lattice parameters are 8.351–8.434 Å. analysis revealed a slight shift peaks towards shorter angles when zinc concentration increased from to 0.75. XRD measurements metal ion distribution system. For each sample, data used compute structural characteristics such as spacing, constant, size, oxygen position parameter, tetrahedral octahedral ionic radii, bond lengths. Energy dispersive spectroscopy (EDS) spectra field emission-electron scanning microscope (FESEM) evaluate elemental content morphology. EDS confirmed presence expected elements samples high doping rate more than 180% Zn ions Ni ferrite. evaluated particle sizes determined be 79.2 118.4 nm for 0.75, respectively. nearly spherical shape nanoparticles shown transmission electron (TEM). magnetic moment, remanent, coercivity, saturation magnetization calculated using vibrating sample magnetometer (VSM) results. magnitudes showed influence cation distribution.