Tin-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
| hal.structure.identifier | Department of Chemistry, Lomonosov Moscow State University | |
| dc.contributor.author | AFANASOV, M. I. | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | WATTIAUX, Alain | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | LABRUGÈRE, Christine | |
| hal.structure.identifier | Department of Chemistry, Lomonosov Moscow State University | |
| dc.contributor.author | FABRITCHNYI, P. | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | DELMAS, Claude | |
| dc.date.issued | 2009 | |
| dc.identifier.issn | 0038-1098 | |
| dc.description.abstractEn | In 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.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | Magnetically ordered materials | |
| dc.subject.en | Chemical synthesis | |
| dc.subject.en | Point defects | |
| dc.subject.en | Nuclear resonances | |
| dc.title.en | Tin-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.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.ssc.2009.05.030 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Solid State Communications | |
| bordeaux.page | 1333-1336 | |
| bordeaux.volume | 149 | |
| bordeaux.issue | 33-34 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00420693 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00420693v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Solid%20State%20Communications&rft.date=2009&rft.volume=149&rft.issue=33-34&rft.spage=1333-1336&rft.epage=1333-1336&rft.eissn=0038-1098&rft.issn=0038-1098&rft.au=AFANASOV,%20M.%20I.&WATTIAUX,%20Alain&LABRUG%C3%88RE,%20Christine&FABRITCHNYI,%20P.&DELMAS,%20Claude&rft.genre=article |
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