Observation of the defect states in individual Co-doped ZnO dilute magnetic semiconducting nanostructures by electron energy-loss spectroscopy

Z.H Zhang,H.L Tao,L.L Pan,Lin Gu,M He,B Song,Q Li

doi:10.1016/j.scriptamat.2013.04.016

Observation of the defect states in individual Co-doped ZnO dilute magnetic semiconducting nanostructures by electron energy-loss spectroscopy

Z.H Zhang, H.L Tao + Show 5 more

https://doi.org/10.1016/j.scriptamat.2013.04.016

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Journal: Scripta materialia	Publication Date: Apr 20, 2013
Citations: 2

Affiliation: Harbin Normal University, Dalian Jiaotong University, Chinese Academy of Sciences, Institute of Physics, Harbin Institute of Technology, University of Hong Kong

#Electron Energy-loss Spectroscopy #Core-loss Electron Energy-loss Spectroscopy + Show 8 more

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Abstract

Defects play a crucial role in room temperature ferromagnetism of dilute magnetic semiconductors. Using valence electron energy-loss spectroscopy (EELS), it was found that the band gap of Co-doped ZnO was smaller than undoped ZnO and some mid-gap states appeared. Using core-loss EELS, the fine structures of the O K-edge exhibit material-specific defect features in the oxygen spectra. The EELS measurements with super high spatial resolution provide unambiguous indications that defects are presented in Co-doped ZnO nanostructures. (c) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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