http://repository.iitr.ac.in/handle/123456789/18475| Title: | Raman studies of ZnO: Co thin films |
| Authors: | Zhou H. Chen L. Malik, Vivek K. Knies C. Hofmann D.M. Bhatti K.P. Chaudhary S. Klar P.J. Heimbrodt W. Klingshirn C. Kalt H. |
| Published in: | Proceedings of Physica Status Solidi (A) Applications and Materials Science |
| Abstract: | In this paper we investigate cobalt doped ZnO thin films prepared via different sol-gel methods. XRD shows only the diffraction peaks from wurtzite ZnO without secondary phase, as widely reported in literature, for the Co contents of our samples of 3 to 12%. Raman spectroscopy reveals the existence of antiferromagnetic cobalt oxides like CoO and Co 3O 4 already in intermediately doped samples. Furthermore, the Raman shifts of the doped samples exhibit a shift to higher energy with increasing Co doping content. Unfortunately, Raman spectroscopy is not sensitive to metallic Co and, therefore, cannot be employed to explore the presence of Co clusters. However, we demonstrate that XRD is not a suitable method to rule out the existence of magnetic secondary phases in ZnO doped with transition metals. © 2007 WILEY-VCH Verlag GmbH & Co. KOaA. |
| Citation: | Proceedings of Physica Status Solidi (A) Applications and Materials Science, (2007), 112- 117 |
| URI: | https://doi.org/10.1002/pssa.200673019 http://repository.iitr.ac.in/handle/123456789/18475 |
| Issue Date: | 2007 |
| Keywords: | Antiferromagnetic cobalt oxides Magnetic secondary phases Raman shifts Antiferromagnetism Cobalt Raman spectroscopy Sol-gels Transition metals X ray diffraction Zinc oxide Thin films |
| ISSN: | 18626300 |
| Author Scopus IDs: | 23975285300 57192609266 24758795000 23008910900 7201695611 8894156400 7102053581 7004564961 56233158000 7005513491 56250274500 |
| Author Affiliations: | Zhou, H., Institut für Angewandte Physik, Universität Karlsruhe (TH), Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany Chen, L., Material Sciences Center, Department of Physics, Renthof 5, 35032 Marburg, Germany Malik, V., Institut für Angewandte Physik, Universität Karlsruhe (TH), Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany, Indian Institute of Technology, Delhi, India Knies, C., I. Physics Institute, University of Giessen, Heinrich-Buff-Ring 16, 35392 Gießen, Germany Hofmann, D.M., I. Physics Institute, University of Giessen, Heinrich-Buff-Ring 16, 35392 Gießen, Germany Bhatti, K.P., Indian Institute of Technology, Delhi, India Chaudhary, S., Indian Institute of Technology, Delhi, India Klar, P.J., I. Physics Institute, University of Giessen, Heinrich-Buff-Ring 16, 35392 Gießen, Germany Heimbrodt, W., Material Sciences Center, Department of Physics, Renthof 5, 35032 Marburg, Germany Klingshirn, C., Institut für Angewandte Physik, Universität Karlsruhe (TH), Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany Kalt, H., Institut für Angewandte Physik, Universität Karlsruhe (TH), Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany |
| Corresponding Author: | Zhou, H.; Institut für Angewandte Physik, Universität Karlsruhe (TH), Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany; email: Huijuan.Zhou@physik.uni-karlsruhe.de |
| Appears in Collections: | Conference Publications [PH] |
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