Journal
LIQUID CRYSTALS
Volume 46, Issue 10, Pages 1517-1526Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/02678292.2019.1579928
Keywords
Liquid crystal; electrocaloric effect; photopyroelectric; phase transition
Funding
- Pole Metropolitain de la Cote d'Opale
- Universite du Littoral Cote d'Opale
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Electrocaloric effect (ECE) in two ferroelectric liquid crystalline (FLC) materials has been evaluated by mean of two indirect characterization methods: the photopyroelectric (PPE) technique and the polarization current reversal one. The obtained results show a good correspondence of the adiabatic temperature change associated with the ECE evaluated from both methods. This validates the possibility to use the PPE technique to investigate the ECE in FLCs. This study also demonstrates that FLCs can be used as electrocaloric material. More particularly, it shows that as for their solid homologous, liquid crystals displays more pronounced ECE in the vicinity of a first order transition than that measured near to second-order one. [GRAPHICS]
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