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Magnetic Characteristics of Carbon-Doped Nanocrystalline TiO _{2}

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8 Author(s)
Wen, Qi-Ye ; State Key Lab. of Electron. Films & Integrated Devices, Univ. of Electron. Sci. & Technol. of China, Chengdu, China ; Zhang, Huai-Wu ; Yang, Qing-Hui ; De-En Gu
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Carbon doped TiO2 nanocrystal powder samples with various C contents were synthesized by a low-temperature sol-gel method, and a large lattice C contents of 12.7% was obtained. We demonstrated that the C ions were homogenously doped into the TiO2 matrix at the form of substitutional C (Cs-o) and interstitial C (CI), without precipitation of TiC and other impurity phase. Our results show that C-doped TiO2 is ferromagnetic with the Curie temperature well above room temperature. The magnetization is mainly related to the content of Cs-o, suggesting that the intrinsic ferromagnetism originates from the Ti-C system in the TiO2 environment.

Published in:

Magnetics, IEEE Transactions on  (Volume:45 ,  Issue: 10 )

Date of Publication:

Oct. 2009

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