DC Field | Value | Language |
dc.contributor.author | Kapphan, SE | |
dc.contributor.author | Kislova, I | |
dc.contributor.author | Wierschem, M | |
dc.contributor.author | Lindemann, T | |
dc.contributor.author | Gao, M | |
dc.contributor.author | Pankrath, R | |
dc.contributor.author | Vikhnin, VS | |
dc.contributor.author | Kutsenko, AB | |
dc.date.accessioned | 2021-12-23T16:16:28Z | - |
dc.date.available | 2021-12-23T16:16:28Z | - |
dc.date.issued | 2003 | |
dc.identifier.issn | 10420150 | |
dc.identifier.uri | https://osnascholar.ub.uni-osnabrueck.de/handle/unios/11885 | - |
dc.description | 9th Europhysical Conference on Defects in Insulating Materials, WROCLAW, POLAND, JUL 01-05, 2002 | |
dc.description.abstract | Congruent SBN and BCT crystals doped with Fe, Cr, Ce to enhance photorefractive properties, are investigated at low temperature (T>1 K) under illumination with Ar+- and Kr+-laser light. Light-induced absorption changes in a wide spectral range from UV to IR indicate photoinduced charge transfer processes from impurities to polaronic centers. Broad NIR absorptions (at about 0,7 eV) associated with Ti3+ polarons in BCT or with Nb4+ polarons in SBN are observed and their non-linear behaviour with illumination intensity, polarization and temperature is described on the basis of the simple model for the photo charge transport (in SBN: Ce3+ Nb5+ <----> Ce4++ Nb4+). A broad visible absorption VIS (at about 2 eV) appearing together with the NIR polarons, is shown by photodissociation (with a Kr+-laser) to consist at least partly of small polarons (in BCT and SBN). | |
dc.language.iso | en | |
dc.publisher | TAYLOR & FRANCIS LTD | |
dc.relation.ispartof | RADIATION EFFECTS AND DEFECTS IN SOLIDS | |
dc.subject | (BCT) barium-calcium-titanate | |
dc.subject | (SBN) strontium-barium-niobate | |
dc.subject | charge transfer model | |
dc.subject | DEFECT | |
dc.subject | DIELECTRIC-PROPERTIES | |
dc.subject | light-induced absorption | |
dc.subject | light-induced dissociation | |
dc.subject | NB4+ POLARONS | |
dc.subject | NIR ABSORPTION | |
dc.subject | Nuclear Science & Technology | |
dc.subject | PHOTOREFRACTIVE PROPERTIES | |
dc.subject | Physics | |
dc.subject | Physics, Condensed Matter | |
dc.subject | Physics, Fluids & Plasmas | |
dc.subject | small polarons | |
dc.subject | STRONTIUM-BARIUM NIOBATE | |
dc.title | Light-induced polaronic absorption at low temperature in pure and (Fe, Ce, Cr) doped SrxBa1-xNb2O6 or Ba1-yCayTiO3 crystals and photodissociation of VIS centers into small polarons | |
dc.type | conference paper | |
dc.identifier.doi | 10.1080/1042015021000052656 | |
dc.identifier.isi | ISI:000182679000059 | |
dc.description.volume | 158 | |
dc.description.issue | 1-6 | |
dc.description.startpage | 357 | |
dc.description.endpage | 362 | |
dc.identifier.eissn | 10294953 | |
dc.publisher.place | 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND | |
dcterms.isPartOf.abbreviation | Radiat. Eff. Defects Solids | |