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Synchrotron photoemission study of (Zn,Co)O films with uniform Co distribution

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Author

  • E. Guziewicz
  • M. I. Lukasiewicz
  • L. Wachnicki
  • K. Kopalko
  • A. Kovacs
  • R. E. Dunin-Borkowski
  • B. S. Witkowski
  • B. J. Kowalski
  • Janusz Sadowski
  • M. Sawicki
  • R. Jakiela
  • M. Godlewski
Show all

Summary, in English

We present results of a resonant photoemission study of (Zn,Co)O films with Co content between 2% and 7%. The films were grown by Atomic Layer Deposition (ALD) at low temperature of 160 degrees C and show fully paramagnetic behavior. The Co ions are uniformly distributed in the ZnO matrix and are free of foreign phases and metal accumulations as indicated by TEM data. The electronic structure of (Zn,Co)O films was studied by Resonant Photoemission Spectroscopy across the Co3p-Co3d photoionization threshold. We have observed that the resonant enhancement of the photoemission intensity from the Co3d shell is not the same for samples with different cobalt content. We suggest that the Co3d contribution to the valence band depends on both Co and H content. (C) 2011 Elsevier Ltd. All rights reserved.

Department/s

Publishing year

2011

Language

English

Pages

1046-1050

Publication/Series

Radiation Physics and Chemistry

Volume

80

Issue

10

Document type

Conference paper

Publisher

Elsevier

Topic

  • Natural Sciences
  • Physical Sciences

Keywords

  • Diluted magnetic semiconductors
  • Atomic layer deposition
  • Resonant
  • photoemission spectroscopy
  • Electronic structure

Conference name

10th International School and Symposium on Synchrotron Radiation in Natural Science (ISSRNS)

Conference date

2010-06-06 - 2010-06-11

Conference place

Szklarska Poreba, Poland

Status

Published

ISBN/ISSN/Other

  • ISSN: 0969-806X