Light-induced charge transport in photorefractive BaTiO3 : Fe and Ba0.77Ca0.23TiO3 : Fe

Autor(en): Mazur, A
Veber, C
Schirmer, OF
Kuper, C
Hesse, H
Stichwörter: Ba1-xCaxTiO3; BaTiO3; CRYSTALS; EPR; Nuclear Science & Technology; optical absorption; OPTICAL-ABSORPTION; perovskite and photorefractive materials; Physics; Physics, Condensed Matter; Physics, Fluids & Plasmas
Erscheinungsdatum: 1999
Herausgeber: GORDON BREACH SCI PUBL LTD
Journal: RADIATION EFFECTS AND DEFECTS IN SOLIDS
Volumen: 150
Ausgabe: 1-4
Startseite: 281
Seitenende: 286
Zusammenfassung: 
Photorefractive barium titanate and 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 samples are electron conductive and the charge Fe2+/3+ at room temperature ir governed by only one level identified by photo-EPR as The optical absorption of Fe2+ in BaTiO3:Fe is found to be at 2.1 eV and in (Ba0.77Ca0.23TiO3) Fe at 1.9 eV.
Beschreibung: 
8th Europhysical Conference on Defects in Insulating Materials (EURODIM98), UNIV KEELE, KEELE, ENGLAND, JUL 06-11, 1998
ISSN: 10420150
DOI: 10.1080/10420159908226244

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