Matrix effect on local structure surrounding Yb3+ and spontaneous emission probability in oxide glasses
✍ Scribed by T. Murata; K. Mazeno; K. Morinaga
- Publisher
- Institute of Physics and National Institute of Materials Science
- Year
- 2002
- Tongue
- English
- Weight
- 156 KB
- Volume
- 3
- Category
- Article
- ISSN
- 1468-6996
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✦ Synopsis
Extended X-ray absorption ®ne structure measurements have been performed on Yb 31 in silicate, borate, phosphate, and gallate glasses in order to investigate the local structures surrounding Yb 31 . The local structures of Yb 31 ions in silicate, borate, and phosphate glasses were similar to those of Er 31 ions. Yb 31 ions do not occupy the network structural sites, but sit around the terminal region of the network or the region between the networks in these glasses. On the other hand, Yb 31 ions substitute the Ga 31 sites in complex anion structural units of the K 2 O±Ga 2 O 3 ±Nb 2 O 5 glasses. We classi®ed the local structures surrounding Yb 31 ions in oxide glasses into two types: the former and the latter are interstitial and substitutive types, respectively. The relationship between the spontaneous emission probability for 2 F 5/2 ! 2 F 7/2 transition of Yb 31 and the local structure of Yb 31 in oxide glasses are discussed in terms of these two types.