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Spin crossover molecular ceramics by Cool-SPS: consequences on switching features beyond the sole microstructural effect

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorEL-KHOURY, Liza
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDARO, Nathalie
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCHASTANET, Guillaume
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorROSA, Patrick
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.authorÉTIENNE, Laetitia
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorMAZEL, Vincent
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorJOSSE, Michaël
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMARCHIVIE, Mathieu
dc.date.issued2024
dc.description.abstractEnThe sintering of spin crossover material using Spark Plasma Sintering at low temperature (Cool-SPS) lead to a new way of shaping such compounds into functional molecular ceramics. These ceramics reach a high relative density of 95%, what may address several issues for using spin crossover materials into barocaloric devices. Starting from the reference complex [Fe(Htrz)2(trz)]BF4, we first investigated the magnetic, structural, microstructural properties as well as the fatigability behavior of the starting powder using multiple magnetic measurements, X-ray diffraction and calorimetry to compare them to the elaborated ceramics. The best conditions of pressure and temperature during the SPS process to obtain reproductible molecular ceramics with high relative density where found to be between 250 and 300 °C, and 300 and 400 MPa. The same complete set of characterizations made on a molecular ceramic of 95% of relative density reveal that crystal structure as well as the abrupt hysteretic SCO of [Fe(Htrz)2(trz)]BF4 are perfectly conserved after sintering. However, ceramic presents a faster stabilization of their microstructural and magnetic properties upon cycling and a higher cooperativity at the macroscopic level was observed compared to the starting powder.
dc.description.sponsorshipMatériaux Moléculaires MagnetoElectriques - ANR-19-CE07-0026
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/
dc.title.enSpin crossover molecular ceramics by Cool-SPS: consequences on switching features beyond the sole microstructural effect
dc.typeArticle de revue
dc.identifier.doi10.1039/D3MA00688C
dc.subject.halChimie/Matériaux
bordeaux.journalMaterials Advances
bordeaux.page1502-1512
bordeaux.volume5
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-04249851
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04249851v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Materials%20Advances&rft.date=2024&rft.volume=5&rft.issue=4&rft.spage=1502-1512&rft.epage=1502-1512&rft.au=EL-KHOURY,%20Liza&DARO,%20Nathalie&CHASTANET,%20Guillaume&ROSA,%20Patrick&DENUX,%20Dominique&rft.genre=article


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