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Oxidation State and Local Structure of Chromium Ions in LaOCl

dc.contributor.authorAntuzevics, Andris
dc.contributor.authorKrieke, Guna
dc.contributor.authorOzols, Haralds
dc.contributor.authorFedotovs, Andris
dc.contributor.authorSarakovskis, Anatolijs
dc.contributor.authorKuzmin, Alexei
dc.date.accessioned2021-06-30T18:23:01Z
dc.date.available2021-06-30T18:23:01Z
dc.date.issued2021
dc.identifier.issn1996-1944
dc.identifier.urihttps://www.mdpi.com/1996-1944/14/13/3539/htm
dc.identifier.urihttps://dspace.lu.lv/dspace/handle/7/55346
dc.descriptionThis research is funded by the Latvian Council of Science, project “Novel transparent nanocomposite oxyfluoride materials for optical applications”, project No. LZP-2018/1-0335. 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 CAMART2.en_US
dc.description.abstractLaOCl doped with 0–10 mol% Cr was synthesized by thermal decomposition of chlorides. X-ray diffraction (XRD) analysis revealed that incorporation of chromium results in a decrease of the lattice parameter a and a simultaneous increase of the lattice parameter c. The local structure of chromium ions was studied with X-ray photoelectron (XPS), X-ray absorption (XANES), multifrequency electron paramagnetic resonance (EPR) and electron-nuclear double resonance (ENDOR) spectroscopy techniques. It was determined that synthesis in oxidizing atmosphere promotes the incorporation of chromium ions predominantly in the 5+ oxidation state. Changes of chromium oxidation state and local environment occur after a subsequent treatment in reducing atmosphere. Spin-Hamiltonian (SH) parameters for a Cr5+ and two types of Cr3+ centers in LaOCl were determined from the EPR spectra simulations.en_US
dc.description.sponsorshipLatvian Council of Science,project No. LZP-2018/1-0335; 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 CAMART2.en_US
dc.language.isoengen_US
dc.publisherMDPIen_US
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/739508/EU/Centre of Advanced Material Research and Technology Transfer/CAMART²en_US
dc.relation.ispartofseriesMaterials;14 (13); 3539
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectResearch Subject Categories::NATURAL SCIENCES:Physicsen_US
dc.subjectLaOClen_US
dc.subjectchromiumen_US
dc.subjectX-ray photoelectron spectroscopy (XPS)en_US
dc.subjectX-ray absorption spectroscopyen_US
dc.subjectelectron paramagnetic resonance (EPR)en_US
dc.subjectelectron-nuclear double resonance (ENDOR)en_US
dc.titleOxidation State and Local Structure of Chromium Ions in LaOClen_US
dc.typeinfo:eu-repo/semantics/articleen_US
dc.identifier.doi10.3390/ma14133539


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