Synthesis and Study of Magnetic Properties of Nano Sized Zn1!xCOxS with High Doping Concentrations by the Wet Chemical Method

Zn1_JCoJS nanocrystallites synthesized by the wet chemical method have been studied. X-ray powder diffraction analysis shows that the solid solubility limit of sphalerite Zn1_JCoJS can reach x = 16%. Further magnetic measurements indicate significant differences for samples with different doping concentrations ratios. Optical properties for samples with high doping concentrations ratios are not investigated because cobalt ions are eliminators of the photoluminescence. Distorted lattice structure and low temperature super-paramagnetism are observed for high doping concentrations samples, while a crystallized structure and abnormal effective magnetic moment (3.3 ,mB/Co) are found in low doping concentrations samples