Magnetism and heterogeneity of Co in anatase Co:TiO2 magnetic semiconductor


Lee, Y.J. and Jong, M.P. de and Jansen, R. (2010) Magnetism and heterogeneity of Co in anatase Co:TiO2 magnetic semiconductor. Applied Physics Letters, 96 (8). 082506. ISSN 0003-6951

[img] PDF
Restricted to UT campus only
: Request a copy
Abstract:Using x-ray magnetic circular dichroism (XMCD), x-ray absorption spectroscopy (XAS), and energy filtered transmission electron microscopy, we provide evidence for a heterogeneous Co distribution in anatase Co:TiO2 magnetic semiconductor having a low Co concentration (1.4 at. %). Multiplet structure due to Co2+ is observed in XAS spectra, but suppressed due to the coexistence of metallic Co clusters and substitutional Co ions, whereas XMCD spectra resemble metallic Co. The presence of Co2+ can be correlated with earlier observations of impurity band conduction and Kondo behavior, whereas metallic Co clusters contribute to the ferromagnetism and anomalous Hall effect.
Item Type:Article
Copyright:© 2010 American Institute of Physics
Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:
Link to this item:
Official URL:
Export this item as:BibTeX
HTML Citation
Reference Manager


Repository Staff Only: item control page