Properties of multilayer composite thin films based on morphotropic phase boundary Pb(Mg1/3Nb2/3)O3-PbTiO3 |
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Authors: | H El Hosiny AliR Jiménez J RicoteJ Pérez de la Cruz JRA Fernandes ML Calzada |
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Affiliation: | a Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, ICMM-CSIC, Cantoblanco, 28049 Madrid, Spainb Instituto de Engenharia de Sistemas e Computadores do Porto, INESC TEC — INESC, Campus da FEUP, Rua Dr. Roberto Frias, 378. 4200‐465 Porto, Portugalc Universidade de Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal |
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Abstract: | It has been reported that ferroelectric and piezoelectric properties of Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMNT) thin films, with compositions close to the morphotropic phase boundary (MPB), show lower values than those reported for bulk ceramics with the same composition, which has been attributed to a reduction of the remnant polarization caused by the small size of the grains in the films. An alternative has been proposed to take full advantage of the excellent piezoelectric properties of polycrystalline PMNT in thin film form: a multilayer configuration that uses ferroelectric layers with large remnant polarization, in this case PbTiO3, to generate an internal electric bias within the PMNT layers and, thus, anchor an induced polarization on them, resulting in a consequent large piezoelectric behavior. The detailed study of the properties of these multilayer composite films reveals the complex correlations that arise in these heterostructures, which are key for the design of optimized piezoelectric films based on MPB PMNT. |
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Keywords: | Thin film Relaxor-ferroelectric Ferroelectricity Piezoelectricity Pyroelectricity Multilayers Perovskite Chemical solution deposition |
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