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Please use this identifier to cite or link to this item: http://hdl.handle.net/2262/31866

Title: Soft x-ray spectroscopic investigation of ferromagnetic Co-doped ZnO
Author: LUNNEY, JAMES GERARD
MCGUINNESS, CORMAC
PATTERSON, CHARLES HUBERT
VENKATESAN, MUNUSWAMY
COEY, JOHN MICHAEL DAVID
Sponsor: Irish Research Council for Science Engineering and Technology
Enterprise Ireland
Higher Education Authority
Science Foundation Ireland
Author's Homepage: http://people.tcd.ie/cmcguin
Keywords: Physics
Issue Date: 2006
Publisher: American Institute of Physics
Citation: S. Krishnamurthy, C. McGuinness, L. S. Dorneles, M. Venkatesan, J. M. D. Coey, J. G. Lunney, C. H. Patterson, K. E. Smith, T. Learmonth, P.A. Glans, T. Schmitt, J.-H. Guo 'Soft x-ray spectroscopic investigation of ferromagnetic Co-doped ZnO' in Journal of Applied Physics, 99, 08M111, 2006, pp 1 - 3
Series/Report no.: Journal of Applied Physics
99
08M11
Abstract: The electronic properties of cobalt-doped ZnO were investigated through site-selective and element-sensitive x-ray-absorption spectroscopy in the vicinity of the Co L2,3 edge, the oxygen K edge, and at the Zn L3 edge. The spectroscopic measurements of the ferromagnetic cobalt-doped ZnO films appear to have additional components in the O K edge x-ray-absorption spectrum not observed in the undoped films. The observed features may derive from both hybridization with unoccupied Co 3d states and also from lattice defects such as oxygen vacancies. Only minor changes in the Zn L3 edge spectra were observed. These observations are consistent with a polaron percolation model in which the ferromagnetic coupling is mediated by shallow donor electrons trapped in oxygen vacancies and couples the Co atoms substituted on Zn sites in the hexagonal wurtzite ZnO structure.
Description: PUBLISHED
URI: http://dx.doi.org/10.1063/1.2165916
http://hdl.handle.net/2262/31866
Appears in Collections:Physics (Scholarly Publications)

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