[This article belongs to Volume - 55, Issue - 01, 2023]
Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-25-01-2023-033

Title : INFLUENCE OF LANTHANUM ON THE STRUCTURAL, MORPHOLOGICAL, OPTOMAGENTIC, AND DIELECTRIC PROPERTIES OF THE MG-CO-CU NANO FERRITES.
M.Manikandan1, N. Sundaramurthy1, 2*, S. Rajalakshmi3

Abstract :

Sol-gel auto-combustion technology was used to create Mg-Co-Cu nano ferrites that are doped with lanthanum and have the chemical formula Mg0.5Co0.25Cu0.25Fe¬LaxO4 (x = 0.0, 0.025, 0.05, 0.075, 0.1). At 1000 °C, all of the samples were sintered. The creation of the cubic spinel structure can be seen in all samples, according to the X-ray diffraction (XRD) investigation. As it turns out, the lattice constant fluctuates with the presence of La3+ compounds, increasing when more La3+ ions are added. The Fourier transform infrared (FT-IR) measurement that was obtained supports the creation of the spinel structure as well. The higher frequency v1 is edging a little bit closer to the high-frequency side with the rise in La. Particles with spherically cubic crystallite shapes are visible in pictures obtained using FESEM. Energy dispersive X-ray analysis was used to confirm the presence of components, or constituents, such as Mg, Co, Cu, Fe, and La. (EDX). La3+ doping was accomplished, and it was determined. By using X-ray photoelectron spectroscopy, the binding energies of La, Mg, Co, Cu, Fe, and O were determined. The impedance study verified the short crystal size, resulting in a grain border contribution more significant than the grain contribution. Growing frequencies resulted in a drop in the dielectric constant and dielectric losses. When the sample's La doping content was at x = 0.025, the sample's magnetic characteristics were at their best. This suggests that using the right amount of doping can enhance the samples' magnetic characteristics. The substitution of non-magnetic La3+ ions for magnetic Fe3+ ions (5μB) results in a decrease in the magnetic moment, which lowers the net total magnetic moment.