Nouchokgwe Y., Lheritier P., Aramberri H., Torello A., Usui T., Hirose S., Kovacova V., Defay E.
International Journal of Thermal Sciences, vol. 210, art. no. 109520, 2025
The electrocaloric effect arises from changes in entropy due to changes in electric field. This effect is particularly significant at the transition temperature of first-order transition materials such as lead scandium tantalate. In this study, we measured the transition isothermal entropy change of this material in the form of multilayer capacitors using the Clausius–Clapeyron method. The transition entropy was determined by analyzing the field dependence of the transition temperature and the transition jump in polarization. As a result, our lead scandium multilayer capacitors demonstrated a transition entropy change of 2.7 J kg<sup>−1</sup> K<sup>−1</sup>. This value is consistent with previously reported values and is in line with the thermally driven entropy change of 2.4 J kg<sup>−1</sup> K<sup>−1</sup>.
