Abstract
The fluorescence of the Tb3+ ion in the apatite Ca10-2xNaxTbxF2(PO4)6 (0 ≤ x ≤ 2) is reported. The active ion is quasi exclusively located in the Cs site of the apatitic structure. Non radiative de-excitation from the 5D3 level to the 5D4 can be explained using cross-relaxation; the process is well described using the Inokuti and Hirayama model for a dipole-quadrupole interaction, leading to a Tb3+ critical concentration of 2.9% and to a critical distance of 1.21 nm. Moreover, at room temperature, phonons play a role in the 5D3 → 5D4 relaxation, with a very weak probability.
| Original language | English |
|---|---|
| Pages (from-to) | 605-613 |
| Number of pages | 9 |
| Journal | Materials Research Bulletin |
| Volume | 28 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 1993 |
| Externally published | Yes |
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering