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We report the discovery of serendipitous electrocaloric effects in commercialmultilayer capacitors based on ferroelectric BaTiO3. Direct thermometry records~0.5 K changes due to 300 kV cm-1, over a wide range of temperatures near andabove room temperature. Similar results are obtained indirectly, viathermodynamic analysis of ferroelectric hysteresis loops. We compare andcontrast these two results. Optimised electrocaloric multilayer capacitorscould find applications in future cooling technologies.

Direct and indirect electrocaloric measurements using multilayer capacitors