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hal.structure.identifierInstitut Laue-Langevin [ILL]
dc.contributor.authorLEMÉE-CAILLEAU, Marie-Hélène
hal.structure.identifierGroupe matière condensée et matériaux [GMCM]
dc.contributor.authorECOLIVET, Claude
hal.structure.identifierInstitut Laue-Langevin [ILL]
dc.contributor.authorOULADDIAF, Bachir
hal.structure.identifierLaboratoire Léon Brillouin [LLB - UMR 12]
dc.contributor.authorMOUSSA, Fernande
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLÉTARD, Jean-François
dc.date.issued2009
dc.identifier.issn0921-4526
dc.description.abstractEnTransition metal complexes present solid state phase transitions associated with a change of the spin state, low-spin at low temperature to high-spin at high temperature, often with a significant change of metal-ligand bond lengths. Elastic interactions between small low-spin molecules and large high-spin ones play an important role in the phase transition. Since the discovery of spin crossover phenomenon, the complex [Fe (ptz)<sub>6</sub>](BF<sub>4</sub>)<sub>2</sub> has successfully attracted the interest of scientists because of its complete spin conversion and of its sensitivity to light. This very rich phase multi-stability also offers a unique possibility to investigate carefully the spin crossover phenomena in diverse fundamental cases (coupled with a ferroelastic transition, after quenching, after irradiation, ...), and in an unusual case where the metal ion lies on a high-symmetry site. On the basis of results obtained by neutron scattering under high pressure, we present here the (pressure–temperature) phase diagram of the complex [Fe (ptz)<sub>6</sub>](BF<sub>4</sub>)<sub>2</sub>, which appears as seriously more complex than expected from the earlier literature, with in particular at least two new phases, one corresponding to complexes in a high-spin state but stacked in low symmetry, the other arising from an unexpected reconstructive phase transition.
dc.language.isoen
dc.publisherElsevier
dc.subject.enSpin transition
dc.subject.enCrossover
dc.subject.enFerroelasticity
dc.subject.enHigh pressure
dc.subject.enNeutron scattering
dc.typeArticle de revue
dc.identifier.doi10.1016/j.physb.2008.11.021
dc.subject.halChimie/Matériaux
bordeaux.journalPhysica B: Condensed Matter
bordeaux.page379-381
bordeaux.volume404
bordeaux.issue3-4
bordeaux.peerReviewedoui
hal.identifierhal-00365997
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00365997v1
bordeaux.COinSctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.jtitle=Physica%20B:%20Condensed%20Matter&amp;rft.date=2009&amp;rft.volume=404&amp;rft.issue=3-4&amp;rft.spage=379-381&amp;rft.epage=379-381&amp;rft.eissn=0921-4526&amp;rft.issn=0921-4526&amp;rft.au=LEM%C3%89E-CAILLEAU,%20Marie-H%C3%A9l%C3%A8ne&amp;ECOLIVET,%20Claude&amp;OULADDIAF,%20Bachir&amp;MOUSSA,%20Fernande&amp;L%C3%89TARD,%20Jean-Fran%C3%A7ois&amp;rft.genre=article


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