Effect of structural, electrical and magneto-optical properties of CeMnxFe1-xO3-delta perovskite materials

摘要

Rare earth based orthoferrite ceramic presents diverse fascinating properties which focuses the current research work in the preparation of CeMnxFe1-xO3-delta (x = 0, 0.5 and 1) nanomaterials via sol-gel route in order to explore their structural, magnetic optical and electrical properties. The crystallite size and structural phase were determined by powder X-ray-diffraction technique (PXRD). The finger print regions of vibrational bands of CeMnxFe1-xO3-delta (x = 0, 0.5 and 1) were observed in the range of 300-700 cm(-1) from FT-IR spectroscopic studies. The morphology of the synthesized nanomaterials was analyzed using HR-TEM, thus the planes obtained from the selected area diffraction pattern corresponding with the XRD phase confirmed the orthorhombic structure of the as synthesized materials. UV-Visible spectra exhibited two noticeable absorption bands in the ultraviolet region and the band gap was found to decrease on doping manganese content. Urbach energy calculated near first and second absorption peaks indicated the nanocrystalline nature of the materials. Further, the dielectric properties, conductivity and impedance analysis were determined. These results obtained demonstrate the physical properties of CeFeO3 system which could be tailored by the appropriate dopant for real-time applications.