| Publication Type |
Journal Article |
| Title |
EXAFS study of the Er3+ ion coordination in SiO2-TiO2-HfO2 sol-gel films |
| Authors |
F. d Acapito Ana C. Marques L. F. Santos Rui M. Almeida |
| Groups |
|
| Journal |
JOURNAL OF NON-CRYSTALLINE SOLIDS |
| Year |
2008 |
| Month |
November |
| Volume |
354 |
| Number |
45 |
| Pages |
4940-4943 |
| Abstract |
The local order around ion-implanted Er3+ ions in SiO2-TiO2-HfO2 thin films prepared by sol-gel, was studied by extended X-ray absorption fine structure at the Er-L-III edge. Both the first and second coordination shells of Er3+ were analyzed for different heat-treatments. While the first coordination shell always consisted of similar to 6-7 oxygen atoms at distances varying between 2.23 and 2.27 angstrom, the Structure of the second shell was found to vary with the film composition and heat-treatment. Namely, whereas Si was found to be the only second neighbor of erbium in binary SiO2-TiO2 films, the addition of HfO2 caused a preferential replacement of Si by Hf. The post-implantation thermal treatments also played a fundamental role in determining the final environment of the erbium ions. (C) 2008 Elsevier B.V. All rights reserved. |
| DOI |
http://dx.doi.org/10.1016/j.jnoncrysol.2008.07.008 |
| ISBN |
|
| Publisher |
|
| Book Title |
|
| ISSN |
0022-3093 |
| EISSN |
|
| Conference Name |
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| Bibtex ID |
ISI:000261271100005 |
| Observations |
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