A study of structural, optical and magnetic properties of Zn_(0.97-x)Cu_xCr_(0.03)O diluted magnetic semiconductors

摘要

A set of Zn_(0.97-x)Cu_xCr_(0.03) (0 < = x < = 0.03) samples has been synthesized by the sol-gel method. The structural, optical and magnetic properties of the samples were investigated by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) and vibrating sample magnetometer (VSM). With Cu doping concentration increasing up to 2 at%, the XRD results showed that all diffraction peaks corresponded to wurtzite structure of ZnO, but for Zn_(0.94)Cu_(0.03)Cr_(0.03) O, the secondary phase of Cu emerged.