Enhanced electrocaloric and pyroelectric response from ferroelectric multilayers
Authors:
- 4 August 2014
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 105 (5) , 052901
Abstract
Room temperature pyroelectric properties and adiabatic temperature change of (001)-textured ferroelectric multilayers on Si are computed by taking into account electrostatic interlayer interactions and thermal strains. We show that by adjusting internal electrical fields through changing relative thicknesses in a multilayer ferroelectric construct, electrothermal properties can be significantly enhanced. A quantitative analysis is provided for BaTiO3-PbZr0.2Ti0.8O3 (BTO-PZT) and SrTiO3-PbZr0.2Ti0.8O3 (STO-PZT) multilayers. For instance, 0.74 × BTO-0.26 × PZT and 0.35 × STO-0.65 × PZT bilayers show ∼120% and 65% increase in electrocaloric response, respectively, compared to PZT films on Si for ΔE = 500 kV/cm.Keywords
Funding Information
- Air Force Office of Scientific Research (FA9550-11-1-0073)
- Army Research Office (W911NF-10-1-0482)
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