A comprehensive investigation on optical and magnetic properties of Ce1−xDyxO2 nanoparticles prepared by solid state reaction method
摘要
The study involves the synthesis and analysis of nano powders of Dy-doped CeO2 dilute magnetic semiconductors (DMS). The solid state reaction approach was used to synthesise. Structural analysis was synthesised constituents using XRD revealed that the crystallite size increased from 16.9 to 40.43 nm, and the lattice constant increased from 5.426 to 5.461 Å with an increase in Dy doping concentration. Furthermore, the analysis confirmed that there were no other phases present after doping, and the synthesised nanoparticles exhibited a cubic structure. The surface shape and elemental content of the nanoparticles are examined using SEM and EDAX. The nanoparticles have a spherical morphology and possess a stoichiometric ratio that closely matches the predicted value. The optical band gap of CeO2 nanoparticles doped with Dy is computed, and it is seen that the band gap decreases as the concentration of the dopant increases. Photoluminescence (PL) study of Ce1−xDyxO2 nanoparticles at excitation wavelengths of 425 nm demonstrated emission in the violet, blue, green, and red areas spanning from 350 to 800 nm. The powder sample of Ce1−xDyxO2 was examined, and it was noted that the surface morphology exhibited a spherical shape. The nano powder samples exhibit Paramagnetic properties. The magnetic moment of Ce1−xDyxO2 nanoparticles that have undergone annealing exhibited a range of magnetization values, from 21.52 × 10–3 to 78.31 × 10–3 emu/g. Additionally, the coercivity of these nanoparticles varied from 1.28 to 8.24 Oe, while the retentivity ranged from 6.83 × 10–6 to 12.56 × 10–6 emu/g. Each of these investigation was systematically arranged, physically displayed using graphs and further elaborated upon in the following sections and these substances would be suitable for use in spintronic applications.