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Untangling surface oxygen exchange effects in YBa2Cu3O6+x thin films by electrical conductivity relaxation

The kinetics of oxygen incorporation (in-diffusion process) and excorporation (out-diffusion process), in YBa2Cu3O6+x (YBCO) epitaxial thin films prepared using the chemical solution deposition (CSD) methodology by the trifluoroacetate route, was investigated by electrical conductivity relaxation measurements. We show that the oxygenation kinetics of YBCO films is limited by the surface exchange process of oxygen molecules prior to bulk diffusion into the films. The analysis of the temperature and oxygen partial pressure influence on the oxygenation kinetics has drawn a consistent picture of the oxygen surface exchange process enabling us to define the most likely rate determining step. We have also established a strategy to accelerate the oxygenation kinetics at low temperatures based on the catalytic influence of Ag coatings thus allowing us to decrease the oxygenation temperature in the YBCO thin films

Authors acknowledge the MICIN (NANOSELECT, CSD2007‐00041 and MAT2014‐51778‐ C2‐1‐R and C2‐2‐R), Generalitat de Catalunya (2014SGR 753 and Xarmae), and the EU (EU‐FP7 NMP‐LA‐2012‐280432 EUROTAPES project, Cost Action MP1201) and ERC ADG‐2014‐669504

© Physical Chemistry Chemical Physics, 2017, vol. 19, núm. 21, p.14129‐14140

Royal Society of Chemistry (RSC)

Manager: Ministerio de Economía y Competitividad (Espanya)
Author: Cayado, Pablo
Sánchez‐Valdés, C.F.
Stangl, A.
Coll, M.
Roura Grabulosa, Pere
Palau, A.
Puig, Teresa
Obradors, Xavier
Date: 2017 April 28
Abstract: The kinetics of oxygen incorporation (in-diffusion process) and excorporation (out-diffusion process), in YBa2Cu3O6+x (YBCO) epitaxial thin films prepared using the chemical solution deposition (CSD) methodology by the trifluoroacetate route, was investigated by electrical conductivity relaxation measurements. We show that the oxygenation kinetics of YBCO films is limited by the surface exchange process of oxygen molecules prior to bulk diffusion into the films. The analysis of the temperature and oxygen partial pressure influence on the oxygenation kinetics has drawn a consistent picture of the oxygen surface exchange process enabling us to define the most likely rate determining step. We have also established a strategy to accelerate the oxygenation kinetics at low temperatures based on the catalytic influence of Ag coatings thus allowing us to decrease the oxygenation temperature in the YBCO thin films
Authors acknowledge the MICIN (NANOSELECT, CSD2007‐00041 and MAT2014‐51778‐ C2‐1‐R and C2‐2‐R), Generalitat de Catalunya (2014SGR 753 and Xarmae), and the EU (EU‐FP7 NMP‐LA‐2012‐280432 EUROTAPES project, Cost Action MP1201) and ERC ADG‐2014‐669504
Format: application/pdf
Citation: 026988
ISSN: 1463-9076 (versió paper)
1463-9084 (versió electrònica)
Document access: http://hdl.handle.net/10256/14152
Language: eng
Publisher: Royal Society of Chemistry (RSC)
Collection: MINECO/PE 2015-2017/MAT2014-51778-C2-2-R
Reproducció digital del document publicat a: http://dx.doi.org/10.1039/C7CP01855J
Articles publicats (D-F)
Is part of: © Physical Chemistry Chemical Physics, 2017, vol. 19, núm. 21, p.14129‐14140
Rights: Tots els drets reservats
Subject: Superconductors d’alta temperatura
High temperature superconductors
Solució (Química)
Solution (Chemistry)
Title: Untangling surface oxygen exchange effects in YBa2Cu3O6+x thin films by electrical conductivity relaxation
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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