Photoluminescence of Eu 3+ in Layered A 2 B 2 O 7 Ferroelectric Crystals
The excitation and emission spectra of Eu 3+ in the ferroelectric Sr 2 Ta 2 O 7 , Sr 2 Nb 2 O 7 and La 2 Ti 2 O 7 have been measured. The crystal field symmetry around the Eu 3+ is discussed in connection with the layered perovskite structure of these oxides. It has been found that the 5 D 0 - 7 F 2...
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| Veröffentlicht in: | Japanese Journal of Applied Physics 1985-01, Vol.24 (S2), p.662 |
|---|---|
| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | The excitation and emission spectra of Eu
3+
in the ferroelectric Sr
2
Ta
2
O
7
, Sr
2
Nb
2
O
7
and La
2
Ti
2
O
7
have been measured. The crystal field symmetry around the Eu
3+
is discussed in connection with the layered perovskite structure of these oxides. It has been found that the
5
D
0
-
7
F
2
emission lines in Sr
2
Ta
2
O
7
:Eu
3+
and Sr
2
Nb
2
O
7
:Eu
3+
change with the structural phase transition. |
|---|---|
| ISSN: | 0021-4922 1347-4065 |
| DOI: | 10.7567/JJAPS.24S2.662 |