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| Página principal > Artículos > Artículos publicados > Deconvolution of Phonon Scattering by Ferroelectric Domain Walls and Point Defects in a PbTiO3Thin Film Deposited in a Composition-Spread Geometry |
| Fecha: | 2021 |
| Resumen: | We present a detailed analysis of the temperature dependence of the thermal conductivity of a ferroelectric PbTiO3 thin film deposited in a composition-spread geometry enabling a continuous range of compositions from ∼25% titanium deficient to ∼20% titanium rich to be studied. By fitting the experimental results to the Debye model we deconvolute and quantify the two main phonon-scattering sources in the system: ferroelectric domain walls (DWs) and point defects. Our results prove that ferroelectric DWs are the main agent limiting the thermal conductivity in this system, not only in the stoichiometric region of the thin film ([Pb]/[Ti] ≈ 1) but also when the concentration of the cation point defects is significant (up to ∼15%). Hence, DWs in ferroelectric materials are a source of phonon scattering at least as effective as point defects. Our results demonstrate the viability and effectiveness of using reconfigurable DWs to control the thermal conductivity in solid-state devices. |
| Ayudas: | Agencia Estatal de Investigación MAT2016-80762-R Agencia Estatal de Investigación PID2019-104150RB-I00 Agencia Estatal de Investigación PGC2018-097789-B-I00 European Commission 734187 European Commission 708129 Agencia Estatal de Investigación BES-2017-079688 |
| Nota: | Altres ajuts: Serra Hunter Fellow (Generalitat de Catalunya) |
| Derechos: | Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets. |
| Lengua: | Anglès |
| Documento: | Article ; recerca ; Versió acceptada per publicar |
| Materia: | Composition-spread combinatorial study ; Ferroelectrics ; Thermal conductivity ; Phonon-scattering mechanisms ; Domain walls |
| Publicado en: | ACS applied materials & interfaces, Vol. 13, Num. 38 (September 2021) , p. 45679-45685, ISSN 1944-8252 |
Postprint 29 p, 1.5 MB |