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Gournay, L., Chaban, I., Mevellec, J.-Y., Humbert, B., Janod, E., Guerin, L., Cammarata, M., Daro, N., Chastanet, G. & Collet, E. (2022) Shifting photo-stationary light-induced excited spin state trapping equilibrium towards higher temperature by increasing light fluence. Chemical Physics Letters, 791 139395. 
Added by: Richard Baschera (2022-06-02 13:20:18)   Last edited by: Richard Baschera (2022-06-02 13:54:14)
Type de référence: Article
DOI: 10.1016/j.cplett.2022.139395
Numéro d'identification (ISBN etc.): 0009-2614
Clé BibTeX: Gournay2022
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Catégories: IMN, PMN
Mots-clés: LIESST, Out-of-equilibrium, Photoinduced phenomena, raman, Spin Crossover
Créateurs: Cammarata, Chaban, Chastanet, Collet, Daro, Gournay, Guerin, Humbert, Janod, Mevellec
Collection: Chemical Physics Letters
Consultations : 4/66
Indice de consultation : 9%
Indice de popularité : 2.25%
Liens URLs     https://www.scienc ... /S0009261422000628
Résumé     
The Light-Induced Excited Spin-State Trapping (LIESST) process allows tuning the electronic state of spin-crossover materials from low (LS) to high spin (HS) states. The photoinduced HS state is long-lived, up to a characteristic temperature, T(LIESST), above which the system relaxes rapidly to the LS state. We study the effect of light irradiance on competing LS → HS up-conversion and HS → LS thermal relaxation on the [Fe(phen)2(NCS)2] system. Raman spectroscopy and magnetic measurements are used to investigate this phenomenon. An empiric model describes the competition between up conversion and thermal relaxation mechanisms and the stabilization of photo-stationary state towards higher temperature.
  
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