Photoemission study of Zn1−xCoxO as a possible DMS

We report a photoemission spectroscopy (PES) and X‐ray absorption spectroscopy (XAS) study for bulk Zn1−xCoxO samples (x = 0 and 0.1). Both the Co 2p XAS and the Co 2p core‐level PES spectra show that the doped Co ions in Zn1−xCoxO are in the divalent Co2+ (d7) states under the tetrahedral symmetry....

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Bibliographic Details
Published in:Physica Status Solidi (b) 2004-06, Vol.241 (7), p.1529-1532
Main Authors: Wi, S. C., Kang, J.-S., Kim, J. H., Lee, S. S., Cho, S.-B., Kim, B. J., Yoon, S., Suh, B. J., Han, S. W., Kim, K. H., Kim, K. J., Kim, B. S., Song, H. J., Shin, H. J., Shim, J. H., Min, B. I.
Format: Article
Language:English
Subjects:
75.50.Pp
79.60.−i
Exact sciences and technology
Physics
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Summary:We report a photoemission spectroscopy (PES) and X‐ray absorption spectroscopy (XAS) study for bulk Zn1−xCoxO samples (x = 0 and 0.1). Both the Co 2p XAS and the Co 2p core‐level PES spectra show that the doped Co ions in Zn1−xCoxO are in the divalent Co2+ (d7) states under the tetrahedral symmetry. A Co 2p → 3d resonant photoemission spectroscopy measurement shows that the Co 3d states lie near the top of the O 2p valence band. This work suggests that the doped Co ions in Zn1−xCoxO substitute properly for the Zn sites with Co2+ valence states. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.200304598