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: [Fex , 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.
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Received: 5 June 1997 / Accepted: 17 July 1998
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Desaix, A., Roubeau, O., Jeftic, J. et al. Light-induced bistability in spin transition solids leading to thermal and optical hysteresis. Eur. Phys. J. B 6, 183–193 (1998). https://doi.org/10.1007/s100510050540
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DOI: https://doi.org/10.1007/s100510050540