Colossal Reversible Barocaloric Effects in Layered Hybrid Perovskite (C10H21NH3)2MnCl4 under Low Pressure Near Room Temperature |
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| Authors: | Junning Li María Barrio David J. Dunstan Richard Dixey Xiaojie Lou Josep-Lluís Tamarit Anthony E. Phillips Pol Lloveras |
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| Affiliation: | 1. School of Physics and Astronomy, Queen Mary University of London, London, E1 4NS UK;2. Grup de Caracterizació de Materials, Departament de Física, EEBE and Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Eduard Maristany, 10-14, Barcelona, 08019 Catalonia;3. Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049 China |
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| Abstract: | Barocaloric effects in a layered hybrid organic–inorganic compound, (C10H21NH3)2MnCl4, that are reversible and colossal under pressure changes below 0.1 GPa are reported. This barocaloric performance originates in a phase transition characterized by different features: A strong disordering of the organic chains, a very large volume change, a very large sensitivity of the transition temperature to pressure and a small hysteresis. The obtained values are unprecedented among solid-state cooling materials at such low pressure changes and demonstrate that colossal effects can be obtained in compounds other than plastic crystals. The temperature-pressure phase diagram displays a triple point indicating enantiotropy at high pressure. |
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| Keywords: | barocaloric effects calorimetry hybrid layered perovskites phase diagrams Raman scattering |
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