Light-induced instability generated by photo-thermal effect in switchable molecular crystals
Groupe d'Etude de la Matière Condensée, Université de Versailles, CNRS UMR 8635 45 Avenue des Etats-Unis, 78035 Versailles cedex, France
Received: 27 June 2013
Accepted: 15 October 2013
The photo-thermal effect of thermo-chromic crystals generates a novel kind of light-induced instability. We investigate here a mean-field (zero-dimensional) approach of the problem using basic equations of heat transfer and spin-crossover phenomena. This mean-field approach compares to the well-known Stoner-Wolfarth mechanism for the magnetization reversal of nano-particles, it should be suited to switchable micro-crystals and leads to auto-catalytic oscillations which remain to be observed. The stabilization of the high-spin–low-spin interface by photo-thermal effect is noticed.
PACS: 75.30.Wx – Spin crossover / 05.45.-a – Nonlinear dynamics and chaos / 78.20.nb – Photothermal effects
© EPLA, 2013