Direct and indirect electrocaloric measurements using multilayer capacitors

Details Direct and indirect electrocaloric measurements using multilayer capacitors Direct and indirect electrocaloric measurements using multilayer capacitors

2009-12-10

arxiv.org/abs/0912.1978v1

J. Phys. D: Appl. Phys 43 (2010) 032002

Physics

Condensed Matter

Materials Science

12 pages, 3 figures

Scientific paper

We report the discovery of serendipitous electrocaloric effects in commercial multilayer 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 and above room temperature. Similar results are obtained indirectly, via thermodynamic analysis of ferroelectric hysteresis loops. We compare and contrast these two results. Optimised electrocaloric multilayer capacitors could find applications in future cooling technologies.

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