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

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....

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Bibliographic Details
Published in:Review of scientific instruments 2023-04, Vol.94 (4)
Main Authors: Fischer, J., Döntgen, J., Molin, C., Gebhardt, S. E., Hambal, Y., Shvartsman, V. V., Lupascu, D. C., Hägele, D., Rudolph, J.
Format: Article
Language:English
Subjects:
Electric fields
Ferroelectric materials
Ferroelectricity
Induced polarization
Infrared radiation
Scientific apparatus & instruments
Temporal resolution
Time measurement
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Summary: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.
ISSN:0034-6748
1089-7623
DOI:10.1063/5.0143706