| Original Articles |
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Vacuum Annealing Induced Room-Temperature Ferromagnetism in Co0.1Ti0.9O2-δ Films Prepared by Sol-Gel Method |
| LIU Li-Feng, KANG Jin-Feng, WANG Yi, ZHANG Xing, HAN Ru-Qi |
| Institute of Microelectronics, Peking University, Beijing 100871 |
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| Cite this article: |
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LIU Li-Feng, KANG Jin-Feng, WANG Yi et al 2008 Chin. Phys. Lett. 25 2638-2641 |
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Abstract The Co-doped TiO2 films (Co0.1Ti0.9O2-∆) are prepared on silicon substrates by sol-gel method and post annealing. The Co0.1Ti0.9O2-∆ film annealed in air is non-ferromagnetic at room temperature. After further annealed in a vacuum, the room-temperature ferromagnetism (RTFM) is observed. Experimental evidences show that the RTFM in the Co0.1Ti0.9O2-∆ film may come from the Co-doped TiO2 matrix and is related to the oxygen vacancies created by vacuum annealing.
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| Keywords:
75.30.Kz
75.50.Pp
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Received: 18 March 2008
Published: 26 June 2008
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| PACS: |
75.30.Kz
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(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
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75.50.Pp
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(Magnetic semiconductors)
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