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Effect of ferromagnetic properties in Al-doped Zn1-xCoxO nanowires synthesized by water-assistance reactive vapor deposition

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8 Author(s)
Liao, L. ; Key Laboratory of Acoustic and Photonic Materials and Devices of Ministry of Educations and Department of Physics, Wuhan University, Wuhan 430072, China ; Lu, H.B. ; Zhang, L. ; Shuai, M.
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The Zn1-xCoxO and Al-doped Zn1-xCoxO nanowires have been synthesized by the water-assistance reactive vapor deposition method. No Co precipitates appeared in the both kinds of ZnO nanowires according to the results observed by high-resolution transmission electron microscope, x-ray diffraction, and electron energy-loss spectroscopy, revealing that the magnetism of the ZnO nanowires was independent of the Co precipitates. The Al-doped Zn1-xCoxO nanowires show much stronger ferromagnetism than Zn1-xCoxO nanowires in the temperature range of 4–350 K. It is believed that the ferromagnetism in Zn1-xCoxO nanowires could be enhanced by Al doping to introduce donor carriers. Moreover, a multiple mechanism for the ferromagnetism of Al-doped Zn1-xCoxO nanowires is discussed.

Published in:

Journal of Applied Physics  (Volume:102 ,  Issue: 11 )