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

Authors
Mazur, A Veber, C Schirmer, OF Kuper, C Hesse, H
Citation
A. Mazur et al., Light-induced charge transport in photorefractive BaTiO3 : Fe and Ba0.77Ca0.23TiO3 : Fe, RADIAT EFF, 150(1-4), 1999, pp. 281-286
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
RADIATION EFFECTS AND DEFECTS IN SOLIDS
ISSN journal
10420150 → ACNP
Volume
150
Issue
1-4
Year of publication
1999
Pages
281 - 286
Database
ISI
SICI code
1042-0150(1999)150:1-4<281:LCTIPB>2.0.ZU;2-A
Abstract
Photorefractive barium titanate and barium-calcium titanate crystals with t he congruently melting composition (Ba0.77Ca0.23TiO3) doped with iron are a nnealed in a hydrogen atmosphere at various temperatures. The samples are s tudied with electron paramagnetic resonance (EPR) and optical absorption bo th performed separately as well as simultaneously before and after illumina tion. The samples are electron conductive and the charge Fe2+/3+ at room te mperature ir governed by only one level identified by photo-EPR as The opti cal absorption of Fe2+ in BaTiO3:Fe is found to be at 2.1 eV and in (Ba0.77 Ca0.23TiO3) Fe at 1.9 eV.