Work

Study of the fast photoswitching of spin crossover nanoparticles outside and inside their thermal hysteresis loop

Year: 2013

Type: article

Abstract: We have studied the low spin to high spin phase transition induced by nanosecond laser pulses outside and within the thermal hysteresis loop of the [Fe(Htrz)2 trz](BF4)2-H2O spin crossover nanoparticles. We demonstrate that, whatever the temperature of the compound, the photo-switching is achieved in less than 12.5 ns. Outside the hysteresis loop, the photo-induced high spin state remains up to 100 μs and then relaxes. Within the thermal hysteresis loop, the photo-induced high spin state remains as long as the temperature of the sample is kept within the thermal loop. A Raman study indicates that the photo-switching can be completed using single laser pulse excitation.

Source: Applied Physics Letters

DOI: 10.1063/1.4792527

Authors: G. Gallé, C. Etrillard, J. Degert, F. Guillaume, J.-F. Létard, E. Freysz