Room temperature study of the optical switching of a spin crossover compound inside its thermal hysteresis loop

Gallé, G.; Deldicque, D.; Degert, J.; Forestier, Th.; Létard, J.-F.; Freysz, E.
January 2010
Applied Physics Letters;1/25/2010, Vol. 96 Issue 4, p041907
Academic Journal
We have studied the low-spin to high spin state phase transition induced by a single or a sequence of nanosecond laser pulses within the thermal hysteresis loop of the [Fe(NH2-trz)3](NO3)2-H2O spin crossover compound. We demonstrate that the final state that is photoinduced can be finely controlled by changing the central wavelength and the energy of the laser pulses. A simple model accounts for the observed phenomena and paves the way for the practical applications to optical data storage at room temperature of spin state transition compounds.


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