Author/Authors :
Chia-Lung Tsai، نويسنده , , Yow-Jon Lin، نويسنده , , Chia-Jyi Liu، نويسنده , , Lance Horng، نويسنده , , Yu-Tai Shih، نويسنده , , Mu-Shan Wang، نويسنده , , Chao-Shien Huang، نويسنده , , Chuan-Sheng Jhang، نويسنده , , Ya-Hui Chen، نويسنده , , Hsing-Cheng Chang، نويسنده ,
Abstract :
Co0.2AlxZn0.8−xO films prepared with different molar ratio of aluminum nitrate to zinc acetate were deposited on substrates by the sol–gel technique. X-ray diffraction, photoluminescence and ferromagnetism measurements were used to characterize the Co0.2AlxZn0.8−xO diluted magnetic semiconductors. The authors found that the intensity of the acceptor-related photoluminescence increased with increasing aluminum concentration and an increase in the number of the acceptor-like defects (zinc vacancies especially) in the Co0.2AlxZn0.8−xO film might lead to the enhancement of the magnetic properties. This implies that controls of the aluminum concentration and the number of the acceptor-like defects are important factors to produce strong ferromagnetism Co0.2AlxZn0.8−xO films prepared by the sol–gel method.
Keywords :
Photoluminescence , Zinc oxide , X-ray diffraction , Magnesium , Oxides
