Room Temperature Ferromagnetism in Co Doped ZnO Thin Film Grown Using Spray Pyrolysis

摘要

Co doped ZnO thin films were prepared using spray pyrolysis. XRD results confirm the absence of metallic Co clusters or any other phase different from wurtzite-type ZnO. UV-VIS studies show that the band edge of ZnO films is red-shifted with Co doping. Room temperature ferromagnetism has been observed in ZnCoO films. The field dependence of magnetization (M-H) curve measured at room temperature using SQUID magnetometer exhibits the clear ferromagnetism (FM).