Giant electrocaloric effect at the antiferroelectric-to-ferroelectric phase boundary in PbZrTiO${}_3$

Abstract

Molecular dynamics simulations predict a giant electrocaloric effect at the ferroelectric-antiferroelectric phase boundary in PZT (PbTiO${}_3$-PbZrO${}_3$). These large-scale simulations also give insights into the atomistic mechanisms of the electrocaloric effect in PZT materials. Studying a range of ferroelectric (FE) and antiferroelectric (AFE) PZT materials we found positive electrocaloric effect in FE composites, but AFE ones exhibit a positive-to-negative crossover. At the AFE-FE phase boundary we find complex domain patterns. We demonstrate that the origin of giant electrocaloric change of temperature is related to the easy structural response of the dipolar system to external stimuli the transition region.

arXiv comment3 pages, 2 figures

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Cited by in corpus (2)

• Origin of the Large Negative Electrocaloric Effect in Antiferroelectric PbZrO3
• Analytical description of the size effect on pyroelectric and electrocaloric properties of ferroelectric nanoparticles