B. Viquerat, J. Degert, M. Tondusson, J. Létard, C. Mauriac, E. Freysz
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Time-domain spectroscopy of spin state transition in polymeric spin crossover compounds
We have measured the evolution of the THz spectrum of polymeric iron(II) spin crossover compounds within the Low-Spin/High-Spin thermal hysteresis loop in the ∼0.6–6 THz frequency range. This study enabled to evidence the large variations of both the refractive optical index and the absorption that occur during the spin state phase transition.