Synthesis and dielectric evaluations of Er doped Mg-Mn-Cr ferrites

• Published in: Journal of Ovonic Research Vol. 20; no. 6; pp. 793 - 802
• Main Authors: Nawaz, Z. H., Elhindi, K. M., Amin, N., Akhtar, M., Mumtaz, S., Arshad, M. I.
• Format: Journal Article
• Language: English
• Published: 15-11-2024
• ISSN: 1584-9953; 1584-9953
• DOI: 10.15251/JOR.2024.206.793

In this study solgel auto-combustion technique was successfully implanted to synthesized Er-doped soft ferrites with the chemical formula Mg₀.₂Mn₀.₈Cr0.03Fe1.97-xErₓO₄ (MMCE ferrites). The required stoichiometric amounts of the chemicals, along with citric acid as a polymerization mediator, were calculated and used. The electrical and structural properties of Er-substituted Mg-Mn-Cr ferrite were characterized using various techniques. X-ray diffraction analysis confirmed that all samples exhibited a single-phase spinel structure with an Fd-3m space group, with X-ray density, lattice constant, and crystallite size varying based on Er concentration. Fourier Transform Infrared (FTIR) spectroscopy revealed stretching and cation vibrations of other groups in the wave number range of 250 cm⁻¹ to 1500 cm⁻¹. Scanning electron microscope (SEM) images showed that the particles were agglomerated, forming larger, closely packed clusters. DC resistivity measurements indicated that the resistivity of the samples increased significantly, reaching 10¹⁰ Ω·m at the highest La concentration. Currently, rare-earth-substituted ferrite nanoparticles are widely used in high-frequency microwave devices due to their exceptional electrical properties, making ferrites highly valuable.