摘要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.
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.
LIU Li-Feng;KANG Jin-Feng;WANG Yi;ZHANG Xing;HAN Ru-Qi. Vacuum Annealing Induced Room-Temperature Ferromagnetism in Co0.1Ti0.9O2-δ Films Prepared by Sol-Gel Method[J]. 中国物理快报, 2008, 25(7): 2638-2641.
LIU Li-Feng, KANG Jin-Feng, WANG Yi, ZHANG Xing, HAN Ru-Qi. Vacuum Annealing Induced Room-Temperature Ferromagnetism in Co0.1Ti0.9O2-δ Films Prepared by Sol-Gel Method. Chin. Phys. Lett., 2008, 25(7): 2638-2641.
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