DocumentCode :
1450054
Title :
Magnetic Characteristics of Carbon-Doped Nanocrystalline TiO 
Author :
Wen, Qi-Ye ; Zhang, Huai-Wu ; Yang, Qing-Hui ; Gu, De-En ; Li, Yuan-xun ; Liu, Ying-Li ; Shen, Jian ; Xiao, J.Q.
Author_Institution :
State Key Lab. of Electron. Films & Integrated Devices, Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Volume :
45
Issue :
10
fYear :
2009
Firstpage :
4096
Lastpage :
4099
Abstract :
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.
Keywords :
Curie temperature; X-ray photoelectron spectra; carbon; doping profiles; ferromagnetic materials; interstitials; magnetisation; nanofabrication; nanostructured materials; semiconductor doping; semiconductor materials; sol-gel processing; titanium compounds; Curie temperature; TiO2:C; XPS spectra; anatase; carbon-doped nanocrystalline powder synthesis; ferromagnetic material; impurity phase; interstitial; intrinsic ferromagnetism; magnetic characteristics; magnetization; sol-gel method; Carbon doping; magnetic semiconductors; nanocrystal; sol-gel;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2009.2024317
Filename :
5257140
Link To Document :
