| authors | Buijs, M.; Meyerink, A.; Blasse, G. |
| source | Journal of Luminescence, Volume: 37, Issue: 1 (1987), pp. 9-20 |
| full text | [Full text]
|
| publisher | Elsevier |
| URL publisher | [Website publisher]
|
| document type | Article |
| disciplines | Natuur- en Sterrenkunde |
| abstract | The Eu3+ ion occupies two different crystallographic sites in (Y1−xEux)2O3 and (Gd1−xEux)2O3, with site symmetry S6 and C2. Energy transfer over more than 7 Å occurs from Eu3+ (S6) ions to Eu3+ (C2) ions. This is shown to be a direct one-phonon assisted process, in combination with a one-site resonant two-phonon assisted process at higher temperatures. For x = 1 there is energy migration over the Eu3+ (C2) sublattice to quenching impurities. The presence of cooperative absorption points to superexchange interaction between the Eu3+ ions. |
| ISSN | 0022-2313 |
