Cu 1− x Zn x Fe 2 O 4 (0.0 ≤ x ≤ 1.0) nanoparticles were synthesized via a PEG‐assisted combustion route to elucidate the influence of Zn substitution on structural, optical, and magnetic properties. X‐ray diffraction (XRD) confirmed a transition from multiphase CuFe 2 O 4 to a single‐phase normal spinel ZnFe 2 O 4 , accompanied by lattice expansion and crystallite growth. Fourier transform infrared (FTIR) analysis revealed progressive cation redistribution and strengthening of tetrahedral AO bonds, while UV–Vis spectra exhibited bandgap widening (1.35–2.03 eV) and defect suppression. X‐ray photoelectron spectroscopy (XPS) further validated the dominant Fe 3+ and Zn 2+ oxidation states and revealed weak Cu 2 p features consistent with low Cu content or mixed‐valence species, confirming the expected chemical environment of Zn‐substituted Cu ferrites. Vibrating sample magnetometer (VSM) studies showed soft ferrimagnetism with maximum magnetization at x ≈ 0.2–0.4 due to Fe 3+ migration to B‐sites, followed by a decline at higher Zn from A‐site dilution and spin canting. The cation inversion model ( p ≈ 0.32) successfully reproduced the Bohr magnetons per formula unit ( μ B /f.u.) trend. Zn substitution thus stabilizes the spinel lattice, enhances structural order, and enables tunable optical and magnetic functionalities, making Cu–Zn ferrites promising for multifunctional spintronic and optoelectronic applications.
Rathod et al. (Thu,) studied this question.
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