Simultaneous direct measurement of the electrocaloric and dielectric dynamics of ferroelectrics with microsecond temporal resolution

J Fischer; J Döntgen; C Molin; S E Gebhardt; Y Hambal; V V Shvartsman; D C Lupascu; D Hägele; J Rudolph

doi:10.1063/5.0143706

Simultaneous direct measurement of the electrocaloric and dielectric dynamics of ferroelectrics with microsecond temporal resolution

Rev Sci Instrum. 2023 Apr 1;94(4):043906. doi: 10.1063/5.0143706.

Authors

J Fischer¹, J Döntgen¹, C Molin², S E Gebhardt², Y Hambal³, V V Shvartsman³, D C Lupascu³, D Hägele¹, J Rudolph¹

Affiliations

¹ Ruhr-Universität Bochum, Fakultät für Physik und Astronomie, Arbeitsgruppe Spektroskopie der kondensierten Materie, Universitätsstraße 150, 44780 Bochum, Germany.
² Fraunhofer IKTS, Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Dresden, Germany.
³ Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45141 Essen, Germany.

PMID: 38081230
DOI: 10.1063/5.0143706

Abstract

A contactless technique for direct time-resolved measurements of the full dynamics of the adiabatic temperature change in electrocaloric materials is introduced. The infrared radiation emitted by the electrocaloric sample is sensitively detected with μs time resolution and mK temperature resolution. We present time-resolved measurements of the electrocaloric effect up to kHz frequencies of the driving electric field and down to small field strengths. The simultaneous recording of transients for applied electric field and induced polarization gives a comprehensive view of the correlation of electrocaloric and ferroelectric properties. The technique can further be applied to the continuous measurement of fatigue for >106 electric field cycles.