14:45 - 16:25
ORAL SESSION
Room: Room4
Oral presentation
Chair/s:
Brahim Dkhil
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Direct measurements of electrocaloric PbSc0.5Ta0.5O3 ceramics
Enric Stern-Taulats 1, Pol Lloveras2 3, Maria del Barrio 3, Josep Tamarit 3, Lluís Direct electrocaloric measurements are challenging, and so the majority of electrocaloric studies are performed using indirect methods. We present direct measurements of isothermal heat Q and adiabatic temperature change ∆T using a bespoke calorimeter and 2, Antoni Planes 2, Alex Avramenko 1, Neil Mathur 1, Xavier Moya 1
1 Department of Materials Science & Metallurgy, University of Cambridge 27 Charles Babbage Road, Cambridge CB3 0FS, UK, Cambridge, United Kingdom
2 Departament de Física i Enginyeria Nuclear, ETSEIB, Universitat Politècnica de Catalunya, Diagonal 647, Barcelona, 08028 Catalonia, Spain., Barcelona, Spain
3 Facultat de Física, Departament de la Matèria Condensada, Universitat de Barcelona, Martí i Franquès 1, E-08028 Barcelona, Catalonia, Spain, Barcelona, Spain

Direct electrocaloric measurements are challenging, and so the majority of electrocaloric studies are performed using indirect methods. We present direct measurements of isothermal heat Q and adiabatic temperature change ∆T using a bespoke calorimeter and an ultrafast infra-red camera in the well-known electrocaloric material, PbSc0.5Ta0.5O3 (PST). We find room-temperature values of |Q| ~ 850 J kg-1 and |∆T| ~ 1.8 K, for changes in electric field of 13.4 kVcm-1. The values of Q and ∆T determined using these two independent techniques are in excellent agreement with each other, via values of specific heat measured at zero electric field.

Reference:
We-S54-O-05
Presenter/s:
Alex Avramenko
Presentation type:
Oral communication
Room:
Room4
Chair/s:
Brahim Dkhil
Date:
Wednesday, September 6th, 2017
Time:
15:45 - 16:00
Session times:
14:45 - 16:25
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