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所属单位：[1]Univ Elect Sci & Technol China, State Key Lab Elect Films & Integrated Devices, Chengdu 610054, Peoples R China;[2]Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

发表刊物：IEEE TRANSACTIONS ON MAGNETICS

关键字：Carbon doping; magnetic semiconductors; nanocrystal; sol-gel

摘要：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 (C-I), 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.

文献类型：Article; Proceedings Paper

卷号：45

期号：10

页面范围：4096-4099

ISSN号：0018-9464

是否译文：否