Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/43287

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Title
The electronic structure of tungsten oxide thin films prepared by pulsed cathodic arc deposition and plasma-assisted pulsed magnetron sputtering
Author/Creator
Field, M. R.;  McCulloch, D. G.;  Lim, S. N. H.;  Anders, A.;  Keast, V. J.;  Burgess, R. W.
Institution
The University of Newcastle. Faculty of Science & Information Technology, School of Mathematical and Physical Sciences
Description
Pulsed cathodic arc and pulsed magnetron sputtered WO₃ thin films were investigated using electron microscopy. It was found that the cathodic arc deposited material consisted of the α-WO₃ phase with a high degree of crystallinity. In contrast, the magnetron sputtered material was highly disordered making it difficult to determine its phase. Electron energy-loss spectroscopy was used to study the oxygen K edge of the films and it was found that the near-edge fine structures of films produced by the two deposition methods differed. The oxygen K-edge near-edge structures for various phases of WO₃ were calculated using two different self-consistent methods. Each phase was found to exhibit a unique oxygen K edge, which would allow different phases of WO₃ to be identified using x-ray absorption spectroscopy or electron energy-loss spectroscopy. Both calculation methods predicted an oxygen K edge for the. γ-WO₃ phase which compared well to previous x-ray absorption spectra. In addition, a close match was found between the oxygen K edges obtained experimentally from the cathodic arc deposited material and that calculated for the α-WO₃ phase.
Relation
Journal of Physics: Condensed Matter Vol. 20, Issue 17
Relation
http://dx.doi.org/10.1088/0953-8984/20/17/175216
Date
2008
Publisher
Institute of Physics (IOP) Publishing
Keyword(s)
charge state distributions;  near edge structures;  x-ray absorption;  crystal structure;  WO₃;  phase;  field
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/43287
Identifier
ISSN:0953-8984
Reviewed
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Subject
"Journal of Physics: Condensed Matter"
 
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