Magnetic and structural study of Cu-doped TiO2 thin films
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arXiv
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| Auteurs principaux: | , , , , , , , |
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| Format: | Preprint |
| Publié: |
2007
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| _version_ | 1866911137275052032 |
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| author | Torres, C. E. Rodríguez Golmar, F. Cabrera, A. F. Errico, L. A. Navarro, A. M. Mudarra Rentería, M. Sánchez, F. H. Duhalde, S. |
| author_facet | Torres, C. E. Rodríguez Golmar, F. Cabrera, A. F. Errico, L. A. Navarro, A. M. Mudarra Rentería, M. Sánchez, F. H. Duhalde, S. |
| contents | Transparent pure and Cu-doped (2.5, 5 and 10 at. %) anatase TiO2 thin films were grown by pulsed laser deposition technique on LaAlO3 substrates. The samples were structurally characterized by X-ray absorption spectroscopy and X-ray diffraction. The magnetic properties were measured using a SQUID. All films have a FM-like behaviour. In the case of the Cu-doped samples, the magnetic cycles are almost independent of the Cu concentration. Cu atoms are forming CuO and/or substituting Ti in TiO2. The thermal treatment in air promotes the CuO segregation. Since CuO is antiferromagnetic, the magnetic signals present in the films could be assigned to this Cu substitutionally replacing cations in TiO2. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_cond_mat_0702515 |
| institution | arXiv |
| publishDate | 2007 |
| record_format | arxiv |
| spellingShingle | Magnetic and structural study of Cu-doped TiO2 thin films Torres, C. E. Rodríguez Golmar, F. Cabrera, A. F. Errico, L. A. Navarro, A. M. Mudarra Rentería, M. Sánchez, F. H. Duhalde, S. Materials Science Transparent pure and Cu-doped (2.5, 5 and 10 at. %) anatase TiO2 thin films were grown by pulsed laser deposition technique on LaAlO3 substrates. The samples were structurally characterized by X-ray absorption spectroscopy and X-ray diffraction. The magnetic properties were measured using a SQUID. All films have a FM-like behaviour. In the case of the Cu-doped samples, the magnetic cycles are almost independent of the Cu concentration. Cu atoms are forming CuO and/or substituting Ti in TiO2. The thermal treatment in air promotes the CuO segregation. Since CuO is antiferromagnetic, the magnetic signals present in the films could be assigned to this Cu substitutionally replacing cations in TiO2. |
| title | Magnetic and structural study of Cu-doped TiO2 thin films |
| topic | Materials Science |
| url | https://arxiv.org/abs/cond-mat/0702515 |