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Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Volume 335, 1999 - Issue 1
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Original Articles

Inhomogeneous Effects in the Light-Induced Bistability and Non-Linear Relaxation of Cooperative Spin-Crossover Solids

O. Roubeau Laboratoire de Magnétisme et d'Optique, CNRS-Université de Versailles, 45 Avenue des Etats-Unis, 78035, Versailles, Cedex, FRANCE; Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O.Box 9502, 2300, RA, Leiden, The Netherlands
,
J. G. Haasnoot Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O.Box 9502, 2300, RA, Leiden, The Netherlands
,
J. Linarès Laboratoire de Magnétisme et d'Optique, CNRS-Université de Versailles, 45 Avenue des Etats-Unis, 78035, Versailles, Cedex, FRANCE
&
F. Varret Laboratoire de Magnétisme et d'Optique, CNRS-Université de Versailles, 45 Avenue des Etats-Unis, 78035, Versailles, Cedex, FRANCE
Pages 541-550 | Published online: 24 Sep 2006
 
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Abstract

We interpret experimental data associated with the light-induced bistability of the spin-crossover series [FexCo1−x(btr)2(NCS)2].H2O under permanent light irradiation, and with the underlying cooperative character of the relaxation of the metastable state after photoexcitation. Relaxation curves, light-induced thermal and optical hystereses (LITH, LIOH) and transient regimes are analyzed in the framework of a non-linear macroscopic master equation. Effects of compositional inhomogenities and bulk attenuation of light are accounted for in the model and provide an excellent agreement with the experimental data.

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Related Research Data

Structural aspects of the relaxation process in spin crossover solids: Phase separation, mapping of lattice strain, and domain wall structure
Source: American Physical Society (APS)

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