Defect chemistry in CaF2:Eu3+
| Autor: | Robert J. Hamers, John C. Wright, J. R. Wietfeldt |
|---|---|
| Rok vydání: | 1982 |
| Předmět: | |
| Zdroj: | The Journal of Chemical Physics. 77:683-692 |
| ISSN: | 1089-7690 0021-9606 |
| DOI: | 10.1063/1.443882 |
| Popis: | Site selective spectroscopy has been performed for CaF2:Eu3+ samples as a function of annealing temperature and dopant concentration. The Eu3+ lines have been classified into five sites, two of which correspond with Eu3+ clusters. High annealing temperatures dissociate the clusters and leave Eu3+ ions in cubic and tetragonal sites. The relative concentrations of these sites change anomalously as the Eu3+ concentration is raised. Absolute concentration measurements of all the sites eliminates competing equilibria as a possible explanation. These results confirm the conclusions reached in an earlier paper for a more complex system. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|