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《Acta Physica Sinica》 2008-07
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Structure and magnetic properties of Zn_(1-x)Co_xO thin film

Wu Wen-Qing Shi Tong-Fei Zhang Guo-Bin Fu Yi-Bing Pan Zhi-Yun Sun Zhi-Hu Yan Wen-Sheng Xu Peng-Shou Wei Shi-Qiang (National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230029,China)  
Zn1-x CoxO (x=0.01,0.02) dilute magnetic semiconductor thin films deposited on Si (001) substrates at 650℃ by pulsed laser deposition method were studied by X-ray absorption fine structure,X-ray diffraction and magnetic measurement. The typical ferromagnetic hysteresis curves were obtained by superconducting quantum interference device magnetometry at room temperature. The X-ray diffraction results showed that Zn1-x CoxO films were of the wurtzite structure. The X-ray absorption fine structure results revealed that the Co atoms were incorporated into the ZnO lattice and located at the substitutional Zn sites,and a homogeneous phase of Zn1-x CoxO was formed. Comparing the experimental curves with the theoretical calculation results,the additional peak C was assigned to the oxygen vacancies,which indicated that the ferromagnetism of Zn1-x CoxO films was strongly correlated with the existence of oxygen vacancies.
【Fund】: 国家自然科学基金(批准号:10575099 10635060 10605024)资助的课题~~
【CateGory Index】: O484.43
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