Regensburg 2016 – wissenschaftliches Programm

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DF: Fachverband Dielektrische Festkörper

DF 5: SYCE: Caloric effects in ferroic materials (MM with MA, DF)

DF 5.4: Hauptvortrag

Montag, 7. März 2016, 16:45–17:15, H1

Giant inverse barocaloric effects in ferrielectric ammonium sulphate — Pol Lloveras¹, Enric Stern-Taulats², Maria Barrio¹, Josep Lluis Tamarit¹, Sam Crossley³, Wei Li³, Vladimir Pomjakushin⁴, Antoni Planes², Lluis Mañosa², Neil Mathur³, and •Xavier Moya³ — ¹Departament de Física i Enginyeria Nuclear, ETSEIB, Universitat Politècnica de Catalunya, Diagonal 647, Barcelona, 08028 Catalonia, Spain — ²Facultat de Física, Departament d'Estructura i Constituents de la Matèria, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Catalonia, Spain — ³Department of Materials Science, University of Cambridge, Cambridge, CB3 0FS, UK — ⁴Paul Scherrer Institute, WHGA/133, 5232 Villigen - PSI, Switzerland

Giant barocaloric effects driven by hydrostatic pressure have been suggested for cooling applications, but they are only seen in a small range of magnetic materials that are relatively expensive. Here I will present pressure-dependent calorimetry data to demonstrate giant inverse barocaloric effects in ferrielectric ammonium sulphate, which is made of cheap abundant elements [Lloveras et al., Nature Communications, in press].