Light-induced bistability in spin transition solids leading to thermal and optical hysteresis

A. Desaix, O. Roubeau, J. Jeftic, J.G. Haasnoot, K. Boukheddaden, E. Codjovi, J. Linarès, M. Noguès and F. Varret

The European Physical Journal B: Condensed Matter and Complex Systems, 1998, vol. 6, issue 2, 183-193

Abstract: We investigate the behaviour of photo-excitable, bistable systems, under permanent light irradiation, in presence of relaxation towards the non-excited state. Cooperativity causes bistability of the steady state, leading to light-induced thermal and optical hysteresis (LITH and LIOH). The light-induced instability is expected to induce demixtion, i.e. the coexistence of domains of the two stable steady states. Such effects are evidenced by magnetic and reflectivity measurements on the spin-crossover solid solution: [Fe x , with x= 0.3, 0.5, 0.85. Experimental data are in quantitative agreement with a simple macroscopic model which includes a non-linear relaxation term in the master equation. Copyright EDP Sciences, Springer-Verlag 1998

Keywords: PACS. 64.60.My Metastable phases-70.60.Es Relaxation effects-75.90.+w Other topics in magnetic properties and materials-78.20.Nv Thermooptical and photothermal effects (search for similar items in EconPapers)
Date: 1998
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DOI: 10.1007/s100510050540

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