Unveiling of the theoretical structure and improved magneto-optical properties of Ni0.6Cd0.4FeAl0.5Cr0.5O4 at two annealing temperature for various devices

Abstract

In this research, we have focused to examine en detail how sintering temperature affected the structural and magneto-optical behavior of spinel ferrites Ni_0.6Cd_0.4FeAl_0.5Cr_0.5O₄ elaborated by sol-gel process and sintered at two distinct temperatures (950 °C and 850 °C). X-ray diffraction were used to do the structural study of our compounds, allowing for the calculation of several parameters such as the lattice parameter and crystallite size. To evaluate the precision of the cation distribution, these findings were compared with theoretical values. Besides, an obvious connection involving the calcination temperature, and the unit cell parameters was discovered. Various magnetic parameters such as the saturation magnetization (M_S), coercivity (H_C), the anisotropy constant (K) and squareness ratio (SQ) was determined from hysteresis cycle. Indeed, the dM/dH versus applied field (switching field distribution curves) was plotted and the dM/dH data present a sharp increase in the small field. The fascinating optoelectronic uses of our ferrites materials were emphasized by further examination of the refractive index, penetration depth, extinction coefficients, optical conductivity, and optical dielectric constants. The obtained bandgap values make our samples promising candidates for visible light absorption. This suggests that Al and Cr substituting provide a chance to increase the Nd-Cd system's spectrum of solar absorption.