Electron paramagnetic resonance of Ce3+ in strontium-barium niobate
Autor(en): | Wingbermuhle, J Meyer, M Schirmer, OF Pankrath, R Kremer, RK |
Stichwörter: | ABSORPTION; CERIUM; LINBO3; Physics; Physics, Condensed Matter; SBN; SINGLE-CRYSTALS | Erscheinungsdatum: | 2000 | Herausgeber: | IOP PUBLISHING LTD | Enthalten in: | JOURNAL OF PHYSICS-CONDENSED MATTER | Band: | 12 | Ausgabe: | 18 | Startseite: | 4277 | Seitenende: | 4284 | Zusammenfassung: | The EPR of Ce3+ in congruent SrXBa1-xNb2O6 (x = 0.61) is characterized by the orthorhombic g-tensor {0.89, 3.55, 0.54} with principal axes lying in the c-plane, tilted with respect to the a- and b-axes by 21.1 degrees: and along the c-axis. Ce3+ occupies a single crystallographic site in the crystal, leading to a unique EPR spectrum. The point symmetry of the Ce3+ position, C-1, is lower than that of the replaced alkaline-earth ions, C-4 or C-s. This is attributed to an off-centre movement of Ce3+. The Ce3+ signal decreases under illumination. No further EPR signal is detected to arise from the photoionization of Ce3+. |
ISSN: | 09538984 | DOI: | 10.1088/0953-8984/12/18/312 |
Zur Langanzeige
Seitenaufrufe
1
Letzte Woche
0
0
Letzter Monat
0
0
geprüft am 07.06.2024