Chinese Acad Sci, Inst Semicond, Key Lab Semicond Mat Sci, Beijing 100083, Peoples R China
; Chinese Acad Sci, Inst High Energy Phys, Lab Synchrotron Radiat, Beijing 100039, Peoples R China
Nickel-doped ZnO (Zn(1-x)Ni(x)O) have been produced using rf magnetron sputtering. X-ray diffraction measurements revealed that nickel atoms were successfully incorporated into ZnO host matrix without forming any detectable secondary phase. Ni 2p core-level photoemission spectroscopy confirmed this result and suggested Ni hits it chemical valence of 2 +. According to the . We studied the electronic magnetization measurements, no ferromagnetic but paramagnetic behavior was found for Zn(0.86)Ni(0.14)O. We studied the electronic structure of Zn(0.86)Ni(0.14)O by valence-band photoemission spectroscopy. The spectra demonstrate a structure at similar to 2 eV below the Fermi energy E(F), which is of Ni 3d origin. No emission was found at E(A), suggesting the insulating nature of the film. (c) 2005 Elsevier Ltd. All rights reserved.