Relaxation oscillations during the laser-induced spin state transition of a [Fe(PM-BiA)2(NCS)2] complex | Zendy

B. Viquerat | Zendy; J. Degert | Zendy; J.F. Létard | Zendy; E. Freysz | Zendy

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Relaxation oscillations during the laser-induced spin state transition of a [Fe(PM-BiA)2(NCS)2] complex

Author(s) -

B. Viquerat,

J. Degert,

J.F. Létard,

E. Freysz

Publication year - 2013

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.87.024303

Subject(s) - spin crossover , laser , excited state , relaxation (psychology) , spin (aerodynamics) , spin transition , spin states , laser power scaling , state (computer science) , materials science , atomic physics , lambda , condensed matter physics , physics , chemistry , analytical chemistry (journal) , optics , thermodynamics , psychology , social psychology , algorithm , computer science , chromatography

International audienceWe performed an optical pump-probe experiment to monitor the laser-induced spin state transition of [Fe(PM-BiA)2(NCS)2] spin crossover microcrystallites. The sample is illuminated by a continuous-wave pump laser centered at λ = 976 nm that switches the compound from the low-spin to the high-spin state. When the pump laser is switched on or off, and above a given power threshold, the diffuse reflectivity of the sample increases or decreases, respectively, and presents characteristic damped oscillations that are not due to laser-induced excited spin state trapping. We propose a shell-core model that, due to the laser-induced heating and spin state transition of the microcrystallites, accounts very well for the reported observations

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