Abstract
In this study, MgAlₓFe₂₋ₓO₄ (0 ≤ x ≤ 0.5) nanoparticles were synthesized via the combustion method to investigate the structural, magnetic, optical, and dielectric effects of Al doping on MgFe₂O₄ ferrite. X-ray diffraction (XRD) analysis confirmed the successful formation of the MgFe₂O₄ crystalline phase, with crystallite sizes ranging from 34 to 45 nm. Field emission scanning electron microscopy (FE-SEM) revealed a spherical morphology, and energy-dispersive X-ray spectroscopy (EDX) confirmed the presence of magnesium, iron, oxygen, and the introduced aluminum. Diffuse reflectance spectroscopy measured an optical band gap between 2.03 and 2.13 eV, indicating Al’s influence on electronic properties. Dielectric measurements showed that the Al-doped samples exhibited enhanced dielectric constants and AC conductivity compared to the undoped ferrite, making them promising candidates for optoelectronic, photocatalytic, and energy storage applications. These results highlight the potential of Al-doped MgFe₂O₄ nanoparticles in advancing functional materials for data storage and energy-related technologies.
Published Version
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