J
Jean-François Létard
Researcher at University of Bordeaux
Publications - 181
Citations - 8380
Jean-François Létard is an academic researcher from University of Bordeaux. The author has contributed to research in topics: Spin crossover & LIESST. The author has an hindex of 47, co-authored 174 publications receiving 7809 citations. Previous affiliations of Jean-François Létard include University of Valencia & Ludwig Maximilian University of Munich.
Papers
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Journal ArticleDOI
Crystallographic elucidation of purely structural, thermal and light-induced spin transitions in an iron(II) binuclear complex
Abdellah Kaiba,Helena J. Shepherd,Dalila Fedaoui,Dalila Fedaoui,Patrick Rosa,A. E. Goeta,N. Rebbani,Jean-François Létard,Philippe Guionneau +8 more
TL;DR: A deeper analysis of the structural properties first demonstrates the key role of the bipyridine bridge in the peculiar preliminary pure structural transition shown by the title compound, and reveals an unusual differentiation between the thermal and light-induced HS states.
Journal ArticleDOI
Effect of the metal dilution on the thermal and light-induced spin transition in [FexMn1−x(bpp)2](NCSe)2: When T(LIESST) reaches T1/2
TL;DR: The thermal and light-induced spin transition in [Fe x Mn 1− x (bpp) 2 ](NCSe) 2 (b pp = 2,6-bis(pyrazol-3-yl)pyridine) has been investigated by magnetic susceptibility, photomagnetism and diffuse reflectivity measurements as discussed by the authors.
Journal ArticleDOI
Cyanocarbanion-based spin-crossover materials: photocrystallographic and photomagnetic studies of a new iron(II) neutral chain.
Gaelle Dupouy,Smail Triki,Mathieu Marchivie,Nathalie Cosquer,Carlos J. Gómez-García,Sébastien Pillet,El-Eulmi Bendeif,Claude Lecomte,Saket Asthana,Jean-François Létard +9 more
TL;DR: Detailed X-ray diffraction studies as a function of the temperature showed a strong modification of the iron coordination sphere, whose characteristics are in agreement with the presence of a spin-crossover transition from high spin (HS) to low spin (LS) in 1.
Journal ArticleDOI
Large negative cubic hyperpolarizability for the spin-crossovercompoundcis-bis(thiocyanato)bis[N-(2-pyridylmethylene)aminobiphenyl]iron(ii)
Jean-François Létard,S. Montant,Philippe Guionneau,Partick Martin,Annie Le Calvez,Eric Freysz,Daniel Chasseau,René Lapouyade,Olivier Kahn +8 more
TL;DR: In this article, the first spin-crossover iron compound with negative third-order polarizability was reported, associated with an instantaneous electronic response, and magnetic measurements showed that this compound, characterized by X-ray structural data is in the high-spin form at room temperature.
Book ChapterDOI
Optimizing the Stability of Trapped Metastable Spin States
TL;DR: In this article, the T(LIESST) limit was introduced to measure the limiting temperature above which a photomagnetic effect in a material is erased, by warming the sample from 10 K at a rate of 03 K min−1 min−2.