Files
Document type
ArticleVersion
Published versionPublication date
Publication license
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/216451
Large barocaloric effects in two novel ferroelectric molecular plastic crystals
Journal Title
Director/Tutor
Journal ISSN
Volume Title
Related resource
Abstract
Materials undergoing pressure-driven solid–solid phase transformations can be a valuable alternative for eco-friendly refrigeration, heat pumping and waste heat recovery based on the barocaloric effect. Ferroelectric compounds and plastic crystals have shown their potential in these fields because they may undergo large changes in volume and entropy at the transition, which underpin a large pressure-induced caloric response. Recently, a new class of materials combining a high-temperature plastic phase with a low-temperature ferroelectric phase has been reported. Here we investigate the barocaloric properties of two such “ferroelectric plastic crystals”, namely quinuclidinium perrhenate (C7H14NReO4) and tetramethylammonium tetrachloroferrate (N(CH3)4[FeCl4]). The reversible adiabatic temperature changes under pressure of around 100 MPa (8 K for C7H14NReO4 and 21 K for N(CH3)4[FeCl4]) reach values comparable to other plastic crystals and other materials, which demonstrates a good prospect for this novel barocaloric materials family. The dynamics of the plastic phase for C7H14NReO4 has been investigated by means of quasielastic neutron scattering.
Subject (English)
Citation
Citation
SALVATORI, Alejandro, et al. Large barocaloric effects in two novel ferroelectric molecular plastic crystals. Journal of Materials Chemistry A. 2023. Vol. 11, num. 23, pags. 12140-12150. ISSN 2050-7488. [consulted: 8 of August of 2026]. Available at: https://hdl.handle.net/2445/216451