Fermi-level engineering of BaTiO3 by alkali codoping: increasing the near-infrared absorption by rhodium
| Autor(en): | Scharfschwerdt, R Schirmer, OF Hesse, H Rytz, D |
Stichwörter: | 1.06 MU-M; 1.06-MU-M; CRYSTALS; DOPED BARIUM-TITANATE; INDUCED CHARGE-TRANSPORT; IRON; OPTICAL-ABSORPTION; Optics; PHOTOREFRACTIVE BATIO3-RH; Physics; Physics, Applied; PUMPED PHASE-CONJUGATION; REGIME | Erscheinungsdatum: | 1999 | Herausgeber: | SPRINGER VERLAG | Journal: | APPLIED PHYSICS B-LASERS AND OPTICS | Volumen: | 68 | Ausgabe: | 5 | Startseite: | 807 | Seitenende: | 812 | Zusammenfassung: | Using electron paramagnetic resonance, optical absorption, and fast spectroscopy of light-induced absorption changes, it is shown that codoping BaTiO3:Rh with Na-Ba acceptors raises the charge state of Rh3+ to Rh4+. Subsequent oxidation under high oxygen pressures can lower the Fermi level to Rh4+/5+, leading to increased infrared absorption. The light-induced charge transfer in such specimens is characterised by ``one center'' behaviour. |
ISSN: | 09462171 | DOI: | 10.1007/s003400050708 |
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