Light-induced charge transport processes in photorefractive Ba0.77Ca0.23TiO3 doped with iron

Autor(en): Mazur, A
Veber, C
Schirmer, OF
Kuper, C
Hesse, H
Stichwörter: BARIUM-TITANATE; BATIO3; CRYSTALS; OPTICAL-ABSORPTION; Physics; Physics, Applied
Erscheinungsdatum: 1999
Herausgeber: AMER INST PHYSICS
Journal: JOURNAL OF APPLIED PHYSICS
Volumen: 85
Ausgabe: 9
Startseite: 6751
Seitenende: 6757
Zusammenfassung: 
Photorefractive barium-calcium titanate crystals with the congruently melting composition (Ba0.77Ca0.23TiO3) doped with iron are annealed in a hydrogen atmosphere at various temperatures. The samples are studied with electron paramagnetic resonance (EPR) and optical absorption, both performed separately as well as simultaneously, before and after illumination. The reduced samples are electron conductive and the charge transport at room temperature is governed by only one level identified by photo-EPR as Fe2+/3+. The optical absorption of Fe2+ is found to be peaked at 1.9 eV. (C) 1999 American Institute of Physics. [S0021-8979(99)02609-2].
ISSN: 00218979
DOI: 10.1063/1.370189

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