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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