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Room-temperature ferromagnetism in well-aligned Zn1-xCoxO nanorods

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3 Author(s)
Jih-Jen Wu ; Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan ; Liu, Sai-Chang ; Yang, Ming-Hsun

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Diluted magnetic semiconductor Zn1-xCoxO nanorods with a Curie temperature higher than 350 K have been synthesized by in situ doping of Co in ZnO nanorods using a simple thermal chemical vapor deposition method. Structural analyses indicated that the nanorod possesses the single-crystalline wurtzite structure and there is no segregated cluster of impurity phase appearing throughout the nanorod. The transparence of the Zn1-xCoxO nanorods in the visible region has been examined by UV-visible absorption. The fundamental absorptions of the Zn1-xCoxO nanorods estimated from the absorption spectra do not reveal pronounced difference from that of pure ZnO nanorods.

Published in:

Applied Physics Letters  (Volume:85 ,  Issue: 6 )