Mael Guennou on Muck Rack

Mael Guennou

As seen in: Nature, Physical Review B
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Articles

Tunable electrocaloric effect in lead scandium tantalate through calcium doping

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By Youri Nouchokgwe, Natalya S. Fedorova, Veronika Kovacova, Silvo Drnovšek, Matej Sadl, Michele Melchiorre, Binayak Mukherjee, Uroš Prah, Guillaume Nataf, Torsten Granzow, Mael Guennou, Hana Ursic, Jorge Íñiguez-González, Emmanuel Defay, Pranab Biswas, Ivana Gorican, Nejc Suban
| Nature Verified
Abstract State-of-the-art electrocaloric cooling prototypes rely on the conventional electrocaloric effect of ferroelectric lead scandium tantalate (PbSc0.5Ta0.5O3, PST), which peaks near room temperature. Here, we demonstrate that A-site calcium doping in highly ordered PST modifies its phase transitions and enables precise tuning of the electrocaloric response. The transition temperature shifts down to 258 K and up to 319 K, depending on Ca concentration.
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