Effect of Mg2+ ions co-doping on luminescence and defects formation processes in Gd3(Ga,Al)5O12:Ce single crystals

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dc.contributor.authorBabin, V.
dc.contributor.authorBoháček, Pavel
dc.contributor.authorGrigorjeva, Larisa
dc.contributor.authorKucera, Miroslav
dc.contributor.authorNikl, M.
dc.contributor.authorZazubovich, S.
dc.contributor.authorZolotarjovs, Aleksejs
dc.date.accessioned2020-10-02T10:29:03Z
dc.date.available2020-10-02T10:29:03Z
dc.date.issued2017
dc.descriptionThe work was supported by the Institutional Research Funding IUT02-26 of the Estonian Ministry of Education and Research and the project 16-15569S of the Czech Science Foundation.en_US
dc.description.abstractPhoto- and radioluminescence and thermally stimulated luminescence characteristics of Ce³⁺ - doped and Ce³⁺, Mg²⁺ co-doped Gd3(Ga,Al)5O12 (GAGG) single crystals of similar composition are investigated in the 9–500 K temperature range. The Ce³⁺ - related luminescence spectra and the photoluminescence decay kinetics in these crystals are found to be similar. Under photoexcitation in the Ce³⁺ - and Gd³⁺ - related absorption bands, no prominent rise of the photoluminescence intensity in time is observed neither in GAGG:Ce,Mg nor in GAGG:Ce crystals. The afterglow is strongly reduced in GAGG:Ce,Mg as compared to GAGG:Ce, and the afterglow decay kinetics is much faster. Co-doping with Mg²⁺ results in a drastic decrease of the thermally stimulated luminescence (TSL) intensity in the whole investigated temperature range and in the appearance of a new complex Mg²⁺ - related TSL glow curve peak around 285 K. After irradiation in the Ce³⁺ - related 3.6 eV absorption band, the TSL intensity in GAGG:Ce,Mg is found to be comparable with that in the GAGG:Ce epitaxial film of similar composition. The Mg²⁺ - induced changes in the concentration, origin and structure of the crystal lattice defects and their influence on the scintillation characteristics of GAGG:Ce,Mg are discussed.en_US
dc.description.sponsorshipEstonian Ministry of Education and Research IUT02-26; Czech Science Foundation 16-15569S; Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the European Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART²en_US
dc.identifier.doi10.1016/j.optmat.2017.01.039
dc.identifier.issn0925-3467
dc.identifier.urihttps://dspace.lu.lv/dspace/handle/7/52594
dc.language.isoengen_US
dc.publisherElsevier B.V.en_US
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/739508/EU/Centre of Advanced Material Research and Technology Transfer/CAMART²en_US
dc.relation.ispartofseriesOptical Materials;66
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectResearch Subject Categories::NATURAL SCIENCES:Physicsen_US
dc.subjectLuminescenceen_US
dc.subjectMulticomponent garnetsen_US
dc.subjectSingle crystalsen_US
dc.subjectCe3+en_US
dc.subjectMg2+en_US
dc.subjectScintillatorsen_US
dc.titleEffect of Mg2+ ions co-doping on luminescence and defects formation processes in Gd3(Ga,Al)5O12:Ce single crystalsen_US
dc.typeinfo:eu-repo/semantics/articleen_US
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