Asymmetric electrocaloric effects in PbSc0.5Ta0.5O3 on field application and removal
Abstract
Electrically driven thermal changes in PbSc0.5Ta0.5O3 bulk ceramics are investigated using temperature and electric-field dependent differential scanning calorimetry and infrared thermometry. On first application and removal of electric field, we find asymmetries in the magnitude of isothermal entropy change $\Delta$ S and adiabatic temperature change $\Delta$ T, due to hysteresis. On subsequent field cycling, we find further asymmetries in the magnitude of $\Delta$ T due to non-linearity in the isofield legs of entropy-temperature plots.
- Publication:
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arXiv e-prints
- Pub Date:
- October 2020
- DOI:
- 10.48550/arXiv.2010.15705
- arXiv:
- arXiv:2010.15705
- Bibcode:
- 2020arXiv201015705S
- Keywords:
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- Condensed Matter - Materials Science