EFFECT OF Mn DOPING ON STRUCTURAL, OPTICAL AND MAGNETIC PROPERTIES OF CdS DILUTED MAGNETIC SEMICONDUCTOR NANOPARTICLES

Manganese doped cadmium sulfide diluted Magnetic Semiconductor nanoparticles (CdS:Mn) NPs have been prepared by wet chemical precipitation method at different Mn weight percentages (0, 2, 4, 6, 8, and 10%). Mercaptoethanol is the capping agent that used to form the nanostructure and prevent the aggregations of the particles. The structure properties of the obtained nanoparticles have been studied using x- ray diffraction pattern. Energy dispersive x-ray carried out to specify the chemical composition of the prepared nanoparticles. The optical properties have been determined by analysis of UV-vis and PL spectra. Vibrating sample magnetometer (VSM) technique used to identify the magnetic properties of the samples. The crystal size estimated from (XRD) of the prepared NPs was around similar to (4 - 7) nm with cubic zinc blende structure. EDX spectroscopy was used to confirm the incorporation of Mn at CdS lattice. The energy band gap of the nanoparticles has been estimated using UV-Vis spectroscopy. VSM data of Mn doped CdS nanoparticles show weak hysteresis loops at room temperature which indicating the change from diamagnetic of undoped CdS to superparamagnetic behavior of Mn doped CdS nanoparticles.