Intermolecular control of thermoswitching and photoswitching phenomena in two spin-crossover polymorphs
BALDÉ, Cherif
Institut de Physique de Rennes [IPR]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
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Institut de Physique de Rennes [IPR]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
BALDÉ, Cherif
Institut de Physique de Rennes [IPR]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
< Reduce
Institut de Physique de Rennes [IPR]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Language
en
Article de revue
This item was published in
Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2012-02-01, vol. 85, n° 6, p. 064114 (9 p.)
American Physical Society
English Abstract
We discuss here the important role of inter-molecular coupling for the thermal and lightinduced molecular state switching in the solid state. Investigations were performed on the two crystalline polymorphs of the spin ...Read more >
We discuss here the important role of inter-molecular coupling for the thermal and lightinduced molecular state switching in the solid state. Investigations were performed on the two crystalline polymorphs of the spin crossover [Fe(PM BiA)2(NCS)2] material. In addition to structural studies at thermal equilibrium, light-induced phenomena were investigated through photo-crystallography, photo-magnetic and dynamical optical measurements. Strong similarities between the thermal-equilibrium and the out-ofequilibrium light-induced transformations are observed in each polymorph: strong cooperative phenomena in one polymorph versus weak cooperative ones in the second polymorph. These different responses of the two crystalline forms of the compound to external perturbations are discussed at the microscopic level in terms of Ising-like model and two-mode description of on-site molecular potentials.Read less <
English Keywords
Molecular state
Solid state
Spin crossover
Crystallographic aspects of phase transformations
pressure effects
Nonequilibrium and irreversible thermodynamics
Relaxation effects
Switching phenomena
ANR Project
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Origin
Hal imported