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(a) Cross section of a sample and (b) experimental setup for the characterization of the electrocaloric effects in thin films.
Representative experimentally measured and numerically simulated temporal temperature profiles. A voltage pulse was applied between 0 and 0.1 s to apply an electric field of 80 MV/m across the EC film.
Normalized voltage changes measured across the two different resistance thermometers with different temperature coefficients of resistance (Au and W). In the absence of any appreciable electric or electromagnetic coupling, the normalized voltage change is proportional to the electrical resistance, which is in turn proportional to the temperature change.
Adiabatic EC temperature changes in response to the removal (cooling) of an electric field across the EC terpolymer thin film as a function of the electric field amplitude. The values extracted by analyzing the temporal temperature profiles using the 3D heat diffusion analyses are shown as the inverted triangles. Also shown for reference are the values reported in the literature for terpolymer films of similar compositions.
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