| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Molin, Christian
Fraunhofer Institute for Ceramic Technologies and Systems
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2024Influence of Grain-Growth Inhibitors on Modified (Ba,Sr)(Sn,Ti)O3 for Electrocaloric Applicationcitations
- 2023Influence of Sintering Additives on Modified (Ba,Sr)(Sn,Ti)O3 for Electrocaloric Applicationcitations
- 2022A GaN-based DC-DC Converter with Zero Voltage Switching and Hysteretic Current Control for 99% Efficient Bidirectional Charging of Electrocaloric Capacitive Loads
- 2022Tailoring electrocaloric properties of Ba1-xSrxSnyTi1-yO3 ceramics by compositional modificationcitations
- 2022Electrocaloric temperature changes in epitaxial Ba1-xSrxTiO3 filmscitations
- 2022Enhancing Electrocaloric Heat Pump Performance by Over 99% Efficient Power Converters and Offset Fieldscitations
- 2021Structural and Electric Properties of Epitaxial Na0.5Bi0.5TiO3-Based Thin Filmscitations
- 2021Structural and Electric Properties of Epitaxial Na0.5Bi0.5TiO3-Based Thin Filmscitations
- 2018BaZrxTi1-xO3 epitaxial thin films for electrocaloric investigationscitations
- 2016Structural and ferroelectric properties of epitaxial BaZrxTi1-xO3 thin filmscitations
- 2016Structural and ferroelectric properties of 0.9PMN-0.1PT thin filmscitations
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article
Structural and Electric Properties of Epitaxial Na0.5Bi0.5TiO3-Based Thin Films
Abstract
<jats:p>Substantial efforts are dedicated worldwide to use lead-free materials for environmentally friendly processes in electrocaloric cooling. Whereas investigations on bulk materials showed that Na0.5Bi0.5TiO3 (NBT)-based compounds might be suitable for such applications, our aim is to clarify the feasibility of epitaxial NBT-based thin films for more detailed investigations on the correlation between the composition, microstructure, and functional properties. Therefore, NBT-based thin films were grown by pulsed laser deposition on different single crystalline substrates using a thin epitaxial La0.5Sr0.5CoO3 layer as the bottom electrode for subsequent electric measurements. Structural characterization revealed an undisturbed epitaxial growth of NBT on lattice-matching substrates with a columnar microstructure, but high roughness and increasing grain size with larger film thickness. Dielectric measurements indicate a shift of the phase transition to lower temperatures compared to bulk samples as well as a reduced permittivity and increased losses at higher temperatures. Whereas polarization loops taken at −100 °C revealed a distinct ferroelectric behavior, room temperature data showed a significant resistive contribution in these measurements. Leakage current studies confirmed a non-negligible conductivity between the electrodes, thus preventing an indirect characterization of the electrocaloric properties of these films.</jats:p>