Direct electrocaloric characterization of ceramic films

• DOI: 10.48550/arxiv.2302.06543
• Publication Date: 2023-01-01
• Authors: Uroš Prah; Matej Šadl; Àlvar Torelló; Pierre Lhéritier; Veronika Kováčová; Hana Uršič; Emmanuel Defaÿ
• Keywords: Electrocaloric Effect; Characterization

Reliable and accurate characterization of the electrocaloric effect is necessary to understand intrinsic properties materials. To date, several methods have been developed directly measure effect. However, each them has some limitations, making less suitable for characterizing ceramic films, which rely almost exclusively on indirect methods. Here, a new approach proposed address process rapid heat dissipation in films detect electrically induced temperature change before it thermally bonds with surrounding elements. By using polymer substrate that slows fast infrared imaging, substantial part adiabatic Pb(Mg1/3Nb2/3)O3-based captured. Infrared imaging provides robust technique reduce ratio between measured micrometer-sized single-digit number, ~3.5. The obtained results are validated another direct thermometric method compared an approach. Despite different measurement principles, two agree well. timely could open door verify predicted giant effects thus accelerating their integration into functional devices.