[Sans titre]
| hal.structure.identifier | Institut Laue-Langevin [ILL] | |
| dc.contributor.author | LEMÉE-CAILLEAU, Marie-Hélène | |
| hal.structure.identifier | Groupe matière condensée et matériaux [GMCM] | |
| dc.contributor.author | ECOLIVET, Claude | |
| hal.structure.identifier | Institut Laue-Langevin [ILL] | |
| dc.contributor.author | OULADDIAF, Bachir | |
| hal.structure.identifier | Laboratoire Léon Brillouin [LLB - UMR 12] | |
| dc.contributor.author | MOUSSA, Fernande | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | LÉTARD, Jean-François | |
| dc.date.issued | 2009 | |
| dc.identifier.issn | 0921-4526 | |
| dc.description.abstractEn | Transition 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.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | Spin transition | |
| dc.subject.en | Crossover | |
| dc.subject.en | Ferroelasticity | |
| dc.subject.en | High pressure | |
| dc.subject.en | Neutron scattering | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.physb.2008.11.021 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Physica B: Condensed Matter | |
| bordeaux.page | 379-381 | |
| bordeaux.volume | 404 | |
| bordeaux.issue | 3-4 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00365997 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00365997v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physica%20B:%20Condensed%20Matter&rft.date=2009&rft.volume=404&rft.issue=3-4&rft.spage=379-381&rft.epage=379-381&rft.eissn=0921-4526&rft.issn=0921-4526&rft.au=LEM%C3%89E-CAILLEAU,%20Marie-H%C3%A9l%C3%A8ne&ECOLIVET,%20Claude&OULADDIAF,%20Bachir&MOUSSA,%20Fernande&L%C3%89TARD,%20Jean-Fran%C3%A7ois&rft.genre=article |
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