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Structural and Magnetic Properties of Fe-Doped Anatase TiO2 Films Annealed in Vacuum |
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| Authors: | XU Jian-Ping LI Lan LV Li-Ya ZHANG Xiao-Song CHEN Xi-Ming WANG Jian-Feng ZHANG Feng-Ming ZHONG Wei DU You-Wei |
| Affiliation: | School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384Key Laboratory of Display Materials and Photoelectric Devices (Ministry of Education),Tianjin University of Technology, Tianjin 300384Tianjin Key Laboratory for Photoelectric Materials and Devices, Tianjin 300384Jiangsu Provincial Laboratory for Nanotechnology, National Laboratory of Solid State Microstructure, and Department of Physics, Nanjing University, Nanjing 210093 |
| Abstract: | Structural and magnetic properties of Fe-doped anatase TiO2 films fabricated by sol-gel spin coating are investigated. X-ray diffraction measurements reveal that Fe3+ ions are incorporated into the TiO2 lattice. No ferromagnetism-related secondary phases and magnetic nanoparticles are observed in the films. The presence of electron paramagnetic resonance signals at g ~ 2.0 supports oxygen vacancies and/or defects generated in the films after annealing in vacuum. Magnetic measurements indicate that Fe-doped anatase TiO2 films are ferromagnetic at room temperature. These observations suggest that oxygen vacancies and/or defects are energetically favorable for the long range Fe3+-Fe3+ ferromagnetic coupling in Fe-doped anatase TiO2 films. |
| Keywords: | 75 50 Pp 61 72 Jd 61 72 J- |
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