Abstract
This letter reports the preparation of Ni doped CuAlO2 nanaocrystalline films on sapphire substrates by sol-gel processing and subsequent thermal treatment in vacuum. The crystalline phase in the films was identified to be the delafossite structure by X-ray diffraction. Field-emission scanning electron microscope (FESEM) shows the quasi-cubic shape architecture of the as-prepared CuAlO2 nanaocrystalline films. Upon increasing the band gaps of Ni-doped CuAlO2 nanaocrystalline films increased due to the Burstein-Moss shift. The influence of different Ni doped concentration on absorption spectrum and magnetic properties of CuAlO2 films was discussed.
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