Structural phase transition in the spin-crossover complex [Fe(ptz)<sub>6</sub>](BF<sub>4</sub>)<sub>2</sub> studied by x-ray diffraction
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | LAKHLOUFI, Sabine | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | GUIONNEAU, Philippe | |
hal.structure.identifier | Institut Laue-Langevin [ILL] | |
dc.contributor.author | LEMÉE-CAILLEAU, Marie-Hélène | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | ROSA, Patrick | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | LETARD, Jean-François | |
dc.date.issued | 2010 | |
dc.identifier.issn | 1098-0121 | |
dc.description.abstractEn | The spin-crossover system [Fe(ptz)<sub>6</sub>](BF<sub>4</sub>)<sub>2</sub> has been studied for more than 25 years and is used as a model system to the understanding of the eponymous phenomenon in solid-state materials. However, the structural properties of the low-spin phase formed at low temperature after a slow cooling have never been elucidated due to a splitting of the Bragg peaks. We report here a reinvestigation of this low-spin phase by single-crystal x-ray diffraction. This study demonstrates the perfect matching between the structural and magnetic transitions temperatures and hysteresis width through careful unit-cell temperature dependence. The Bragg splitting is also unambiguously associated to the spin transition. Above all, this work reveals a reversible doubling of the unit-cell parameters a and b corresponding to the spin transition. A preliminary solution for the crystal structure of the low-spin phase notably shows the potential major role of the deformation of the n-propyl groups in the physical behavior of this material. | |
dc.language.iso | en | |
dc.publisher | American Physical Society | |
dc.subject.en | Spin crossover | |
dc.subject.en | Phase transition | |
dc.subject.en | X-ray diffraction | |
dc.subject.en | Inorganic compounds | |
dc.title.en | Structural phase transition in the spin-crossover complex [Fe(ptz)<sub>6</sub>](BF<sub>4</sub>)<sub>2</sub> studied by x-ray diffraction | |
dc.type | Article de revue | |
dc.identifier.doi | 10.1103/PhysRevB.82.132104 | |
dc.subject.hal | Chimie/Matériaux | |
bordeaux.journal | Physical Review B: Condensed Matter and Materials Physics (1998-2015) | |
bordeaux.page | 132104 | |
bordeaux.volume | 82 | |
bordeaux.issue | 13 | |
bordeaux.peerReviewed | oui | |
hal.identifier | hal-00545047 | |
hal.version | 1 | |
hal.popular | non | |
hal.audience | Internationale | |
hal.origin.link | https://hal.archives-ouvertes.fr//hal-00545047v1 | |
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