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

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 midgap states appeared. Using core-loss EELS, the fine struct...

Full description

Saved in:
Bibliographic Details
Published in:Scripta materialia 2013-08, Vol.69 (3), p.262-265
Main Authors: Zhang, Z.H., Tao, H.L., Pan, L.L., Gu, Lin, He, M., Song, B., Li, Q.
Format: Article
Language:English
Subjects:
Cobalt
Defects
Dilute magnetic semiconductors
Electron energy loss spectroscopy
Nanocomposites
Nanomaterials
Nanostructure
Spectroscopy
Transmission electron microscopy
Zinc oxide
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 midgap 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.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2013.04.016