| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Structural and Magnetic Properties of Fe-Doped Anatase TiO2 Films Annealed in Vacuum |
| XU Jian-Ping1,2, LI Lan1,3, LV Li-Ya4, ZHANG Xiao-Song1,3, CHEN Xi-Ming1,2, WANG Jian-Feng4, ZHANG Feng-Ming4, ZHONG Wei4, DU You-Wei4 |
| 1School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 3003842Key Laboratory of Display Materials and Photoelectric Devices (Ministry of Education),Tianjin University of Technology, Tianjin 3003843Tianjin Key Laboratory for Photoelectric Materials and Devices, Tianjin 3003844Jiangsu Provincial Laboratory for Nanotechnology, National Laboratory of Solid State Microstructure, and Department of Physics, Nanjing University, Nanjing 210093 |
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XU Jian-Ping, LI Lan, LV Li-Ya et al 2009 Chin. Phys. Lett. 26 097502 |
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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.
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| Keywords:
75.50.Pp
61.72.Jd
61.72.J-
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Received: 22 April 2009
Published: 28 August 2009
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