Time-domain terahertz spectroscopy of spin state transition in [ Fe ( NH 2 − trz ) 3 ] 2+ spin crossover compounds

We have measured the evolution of the THz spectrum of 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 follow both the variations of the refractive optical index and absorption during the spin state transi...

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Veröffentlicht in:Applied physics letters 2011-08, Vol.99 (6), p.061908-061908-3
Hauptverfasser: Viquerat, B., Degert, J., Tondusson, M., Freysz, E., Mauriac, C., Létard, J. F.
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Sprache:eng
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Zusammenfassung:We have measured the evolution of the THz spectrum of 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 follow both the variations of the refractive optical index and absorption during the spin state transition. Marked absorptions centered ∼2-3 THz and ∼5 THz shifting with the spin state are revealed. Our work provides a means to store optically information and to read it out in the THz domain and also offers indications about the structural evolution occurring during the spin state transition.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3624600