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hal.structure.identifierDepartment of Chemistry, Lomonosov Moscow State University
dc.contributor.authorAFANASOV, M. I.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorWATTIAUX, Alain
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLABRUGÈRE, Christine
hal.structure.identifierDepartment of Chemistry, Lomonosov Moscow State University
dc.contributor.authorFABRITCHNYI, P.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDELMAS, Claude
dc.date.issued2009
dc.identifier.issn0038-1098
dc.description.abstractEnIn situ 119Sn Mössbauer measurements show that annealing in hydrogen atmosphere of co-precipitated chromium and lutetium hydroxides, doped with 0.2 at.% Sn<sup>4+</sup>, results in the formation of Sn<sup>2+</sup> cations on the surface sites of LuCrO<sub>3</sub> microcrystals. Such a distribution of dopant cations is consistent with the anomalously high concentration of tin revealed by X-ray photoelectron spectroscopy (XPS). The 19Sn spectrum recorded above the Néel point of LuCrO<sub>3</sub> attests to the distribution of Sn<sup>2+</sup> ions over two kinds of site. For both of them, the isomer shift and quadrupole splitting values agree with those previously reported for 119Sn<sup>2+</sup> on surface sites of several oxides other than the perovskite-type one. The instantaneous oxidation of tin upon contact with ambient air did not allow us to characterize the cationic surrounding of Sn<sup>2+</sup> by measurements involving sample transfer into a liquid-helium cryostat. Relevant information is obtained for the Sn<sup>2+→4+</sup> oxidized species located on the sites with unchanged <i>cationic</i> surroundings. The spectrum recorded at 4.2 K shows that nearly two-thirds of the Sn<sup>2+→4+</sup> species are spin-polarized to different extents. Comparison with Mössbauer parameters reported for 119Sn ions sitting in the regular Cr-substitution site in the bulk of LuCrO<sub>3</sub> allows us to ascribe the diffuse magnetic contribution to a distribution of Sn<sup>2+→4+</sup> species over Cr-substitution sites with lower (than in the bulk) number of neighboring Cr<sup>3+</sup> ions. The presence of an additional non-magnetic component in the spectrum of Sn<sup>2+→4+</sup> ions points to the location of the remaining Sn<sup>4+</sup> ions and, very likely, the predecessor Sn<sup>2+</sup> ones, on Lu-substitution sites with magnetically compensated (2Cr↑+2Cr↓) surroundings.
dc.language.isoen
dc.publisherElsevier
dc.subject.enMagnetically ordered materials
dc.subject.enChemical synthesis
dc.subject.enPoint defects
dc.subject.enNuclear resonances
dc.title.enTin-doped LuCrO<sub>3</sub>: A new type of material allowing the location of a <sup>119</sup>Sn Mössbauer spectroscopic probe on the gas–solid interface
dc.typeArticle de revue
dc.identifier.doi10.1016/j.ssc.2009.05.030
dc.subject.halChimie/Matériaux
bordeaux.journalSolid State Communications
bordeaux.page1333-1336
bordeaux.volume149
bordeaux.issue33-34
bordeaux.peerReviewedoui
hal.identifierhal-00420693
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00420693v1
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