Elaboration and characterization of Co-doped ZnO thin films deposited by spray pyrolysis technique
The structure and the nature of magnetism of ZnO and Zn1?xCoxO (CZO) thin films (0?x?0.09) deposited on glass substrate at 450C by spray pyrolysis technique is investigated. All the CZO thin films have the ZnO wurtzite structure with a preferential orientation along the c-axis and had no impurity phase. This was also confirmed by transmission electron microscopy analysis. Transmission UVvisible spectroscopy showed that Co2+ was well substituted for the Zn2+ ions in the ZnO matrix. Magnetization measurements at low temperature show that CZO thin films present a paramagnetic behaviour and no sign of ferromagnetism.
thin films spray pyrolysis zncoo dilute magnetic semiconductors