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Evidence for replacing zinc with cobalt and iron atoms in epitaxial ZnO:CoFe-diluted magnetic semiconductors |
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| Authors: | Yen-Fa Liao Hua-Shu Hsu Yen-Heng Huang Tzu-Wen Huang Ming-Zhe Lin Chih-Hao Lee J.C.A. Huang |
| Affiliation: | 1. Department of Engineering and System Science, National Tsing-Hua University, Hsinchu, Taiwan;2. Department of Physics, National Cheng-Kung University, Tainan, Taiwan;3. Department of Applied Physics, National University of Kaohsiung, Kaohsiung, Taiwan |
| Abstract: | The structure and local environment of ZnO:CoFe were investigated. An epitaxial structure of ZnO thin film doped with CoFe on Al2O3 substrate was confirmed by XRD. By fitting the Zn EXAFS spectra, the bond distances and coordination numbers of Zn atoms in the ZnO:CoFe show that Co and Fe ions replace some positions of zinc atoms. The XANES study of Zn and O also show that CoFe cluster formation in this system can be excluded. |
| Keywords: | 61.46.+w 68.65.Ac 78.70.Ck 78.70.Dm 75.50.Pp 81.05.Dz 81.15.Cd |
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