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hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGUAN, Shian
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorSOUQUET-BASIÈGE, Mélanie
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorTOULEMONDE, Olivier
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDENUX, Dominique
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorPENIN, Nicolas
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGAUDON, Manuel
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorROUGIER, Aline
dc.date.issued2019-12-10
dc.identifier.issn0897-4756
dc.description.abstractEnUsing a synthesis route based on carbon as the reducing agent mixed with Nb-doped V2O5 nanopowders, highly crystallized Nb-doped VO2 (M) particles, with tunable content of niobium (Nb), are successfully prepared. The morphology and the crystalline structure are first studied in regard to synthesis parameters and chemical composition for various thermal treatment temperatures/durations and niobium doping concentrations. The second part of this paper is devoted to the control, in Nb-doped VO2, of the phase transition temperature from monoclinic to rutile (M → R transition) versus the niobium doping concentration associated with thermochromic properties and different property changes characterized by differential scanning calorimetry and magnetic and electrical measurements. The niobium introduction allows the decrease of the thermochromic transition from 68 °C down to around room temperature for an effective Nb concentration of approximatively 6 mol % for the V0.94Nb0.06O2±δ composition. A significant result is the decrease of both the hysteresis width as well as the phase transition amplitude supported by latent heat, magnetic behavior, and electrical transport versus niobium concentration. These phenomena are correlated to the breaking of the V–V pairing occurring in the monoclinic form when niobium ions are introduced. Finally, a deep interpretation of the Nb-doped VO2 magnetic behavior is performed considering the impact of niobium concentration and crystallite sizes on the intensity of the Curie magnetic residue plus Van Vleck susceptibility in the low temperature form (M) and on the intensity of the Pauli magnetism of the high temperature form (R).
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enToward room-temperature thermochromism of VO2 by Nb doping : magnetic investigations
dc.typeArticle de revue
dc.identifier.doi10.1021/acs.chemmater.9b03906
dc.subject.halChimie/Matériaux
bordeaux.journalChemistry of Materials
bordeaux.page9819-9830
bordeaux.volume31
bordeaux.issue23
bordeaux.peerReviewedoui
hal.identifierhal-02401952
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02401952v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Chemistry%20of%20Materials&rft.date=2019-12-10&rft.volume=31&rft.issue=23&rft.spage=9819-9830&rft.epage=9819-9830&rft.eissn=0897-4756&rft.issn=0897-4756&rft.au=GUAN,%20Shian&SOUQUET-BASI%C3%88GE,%20M%C3%A9lanie&TOULEMONDE,%20Olivier&DENUX,%20Dominique&PENIN,%20Nicolas&rft.genre=article


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