Properties of Co/Ni codoped ZnO based nanocrystalline DMS

► Nanocrystalline Zn0.9Co0.1−xNixO is synthesized by sol-gel method. ► Co/Ni doping does not change the lattice parameters. ► Average particle size is ∼20 nm. ► Spectroscopic and magnetization studies confirm the formation of DMS. ► XPS data corroborates the presence of Co2+ and Ni2+.