期刊
MAGNETOCHEMISTRY
卷 5, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/magnetochemistry5020021
关键词
spin crossover; heat transfer; photo-magnetism; optical microscopy
资金
- Universite de Versailles
- Universite Paris-Saclay
- Universite de Bordeaux
- CNRS (Centre national de la recherche scientifique)
- Laboratoire International Associe (LIA) IM-LED (Impacting materials with light and electric fields and watching real time dynamics)
We have investigated by means of optical microscopy and magnetic measurements the first-order thermal spin transition of the [{Fe(NCSe)(py)(2)}(2)(m-bpypz)] spin-crossover compound under various shining intensities, far from the light-induced spin-state trapping region. We found evidence of photo-heating effects on the thermally-induced hysteretic response of this spin-crossover material, thus causing the shift of the thermal hysteresis to lower temperature regions. The experimental results are discussed in terms of the apparent crystal temperature and are analyzed theoretically using two evolution equations of motion, written on the high-spin (HS) fraction and heat balance between the crystal and the thermal bath. A very good qualitative agreement was found between experiment and theory in the stationary regime, explaining the experimental observations well and identifying the key factors governing these photo-thermal effects.
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