Influence of (Co-Mn) co-doping on the microstructures, optical properties of sol-gel derived ZnO nanoparticles

A systematic investigation on the synthesis, characterization, optical and magnetic properties of (Co-Mn) co doped ZnO nanoparticles synthesized by sol-gel method is reported. Structural, Optical and magnetic properties of present sample have been characterized by X-ray diffraction (XRD), UV-VIS-NIR spectroscopy and VSM techniques. The single-phased wurtzite structure has been confirmed by XRD analysis. The nanoparticles nature of the samples and their crystallinity has been investigated by TEM measurements. Optical studies revealed red shift (3.315-3.289 eV) with increasing Mn doping concentration in the absorbance spectrum. Magnetization studies showed that Zn0.7Co0.2Mn0.1O exhibits ferromagnetic behavior.