| 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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Chatterjee, Arindom
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2022On the thermoelectric properties of Nb-doped SrTiO3 epitaxial thin filmscitations
- 2022On the thermoelectric properties of Nb-doped SrTiO 3 epitaxial thin filmscitations
- 2020Large thermoelectric power variations in epitaxial thin films of layered perovskite GdBaCo2O5.5±δwith a different preferred orientation and straincitations
- 2020Large thermoelectric power variations in epitaxial thin films of layered perovskite GdBaCo2O5.5±δwith a different preferred orientation and straincitations
- 2020Large thermoelectric power variations in epitaxial thin films of layered perovskite GdBaCo 2 O 5.5±δ with a different preferred orientation and straincitations
- 2019Enhanced thermoelectric properties of lightly Nb doped SrTiO3 thin filmscitations
- 2018An in operando study of chemical expansion and oxygen surface exchange rates in epitaxial GdBaCo2O5.5 electrodes in a solid-state electrochemical cell by time-resolved X-ray diffraction
- 2018An in operando study of chemical expansion and oxygen surface exchange rates in epitaxial GdBaCo2O5.5 electrodes in a solid-state electrochemical cell by time-resolved X-ray diffractioncitations
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article
Large thermoelectric power variations in epitaxial thin films of layered perovskite GdBaCo2O5.5±δwith a different preferred orientation and strain
Abstract
<p>This work describes the growth of thin epitaxial films of the layered perovskite material GdBaCo<sub>2</sub>O<sub>5.5±δ</sub>(GBCO) on different single crystal substrates SrTiO<sub>3</sub>(STO), (LaAlO<sub>3</sub>)<sub>0.3</sub>(Sr<sub>2</sub>TaAlO<sub>6</sub>)<sub>0.7</sub>(LSAT) and LaAlO<sub>3</sub>(LAO) as an approach to study changes in the thermoelectric properties by means of the induced epitaxial strain. In addition to strain changes, the films grow with considerably different preferred orientations and domain microstructures: GBCO films on STO are purelyc-axis oriented (c<sub>⊥</sub>) with an average 0.18% in-plane tensile strain; GBCO on LSAT is composed of domains with a mixed orientation (c<sub>‖</sub>andc<sub>⊥</sub>) with an average 0.71% in-plane compressive strain; while on LAO it isb-axis oriented (c<sub>‖</sub>) with an average 0.89% in-plane compressive strain. These differences result in important cell volume changes, as well as in the orthorhombicity of thea-bplane of the GBCO structure, which in turn induce a change in the sign and temperature dependence of the thermopower, while the electrical conductivity remains almost unchanged. In general, compressively strained films show negativeSthermopower (n-type) while tensile strained films show a positiveS(p-type) at low temperatures, probing the adaptive nature of the GdBaCo<sub>2</sub>O<sub>5.5±δ</sub>compound. These results point to the spontaneous generation of oxygen vacancies to partially accommodate the epitaxial stress as the main cause for this effect.</p>