Structure and magnetism of Zn0.9Co0.1O DMS films prepared by chemical solution deposition method |
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| Authors: | Jinghai Yang Yan Cheng Yongjun Zhang Yaxin Wang Yang Liu |
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| Institution: | a Institute of Condensed State Physics, Jilin Normal University, Siping 136000, PR China
b Key Laboratory of Functional Materials Physics and Chemistry, Jilin Normal University, Ministry of Education, Siping 136000, PR China |
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| Abstract: | The Zn0.9Co0.1O films are fabricated by chemical solution deposition method. All the films have the ZnO wurtzite structure with a preferential orientation along the c-axis. The analysis of X-ray near-edge absorption spectroscopy and X-ray photoelectron spectroscopy indicates that the valence of Co is +2, and there are oxygen vacancies in Zn0.9Co0.1O films annealed in Ar atmosphere. Extended X-ray absorption fine structure results reveal that Co2+ ions have dissolved into ZnO and substituted for Zn2+ ions. Magnetization measurements show that the film annealed in Ar exhibits ferromagnetism which can be explained by the formation of bound magnetic polarons. |
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| Keywords: | Oxygen Vacancy XANES EFXAS Ferromagnetism |
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