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 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physical%20Review%20B:%20Condensed%20Matter%20and%20Materials%20Physics%20(1998-2015)&rft.date=2010&rft.volume=82&rft.issue=13&rft.spage=132104&rft.epage=132104&rft.eissn=1098-0121&rft.issn=1098-0121&rft.au=LAKHLOUFI,%20Sabine&GUIONNEAU,%20Philippe&LEM%C3%89E-CAILLEAU,%20Marie-H%C3%A9l%C3%A8ne&ROSA,%20Patrick&LETARD,%20Jean-Fran%C3%A7ois&rft.genre=article |
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