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Epitaxial YBa2Cu3O7-x nanocomposite thin films from colloidal solutions

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Abstract
A methodology of general validity to prepare epitaxial nanocomposite films based on the use of colloidal solutions containing different crystalline preformed oxide nanoparticles (ex situ nanocomposites) is reported. The trifluoroacetate (TFA) metal-organic chemical solution deposition route is used with alcoholic solvents to grow epitaxial YBa2Cu3O7 (YBCO) films. For this reason stabilizing oxide nanoparticles in polar solvents is a challenging goal. We have used scalable nanoparticle synthetic methodologies such as thermal and microwave-assisted solvothermal techniques to prepare CeO2 and ZrO2 nanoparticles. We show that stable and homogeneous colloidal solutions with these nanoparticles can be reached using benzyl alcohol, triethyleneglycol, nonanoic acid, trifluoroacetic acid or decanoic acid as protecting ligands, thereby allowing subsequent mixing with alcoholic TFA solutions. An elaborate YBCO film growth analysis of these nanocomposites allows the identification of the different relevant growth phenomena, e.g. nanoparticles pushing towards the film surface, nanoparticle reactivity, coarsening and nanoparticle accumulation at the substrate interface. Upon mitigation of these effects, YBCO nanocomposite films with high self-field critical currents (J(c) similar to 3-4MAcm(-2) at 77 K) were reached, indicating no current limitation effects associated with epitaxy perturbation, while smoothed magnetic field dependences of the critical currents at high magnetic fields and decreased effective anisotropic pinning behavior confirm the effectiveness of the novel developed approach to enhance vortex pinning. In conclusion, a novel low cost solution-derived route to high current nanocomposite superconducting films and coated conductors has been developed with very promising features.
Keywords
nanocomposite, coated conductor, colloidal solution, nanoparticle, chemical solution, YBa2Cu3O7, HIGH-TEMPERATURE SUPERCONDUCTORS, METAL-OXIDE NANOCRYSTALS, COATED CONDUCTORS, CURRENT DENSITIES, SCALE SYNTHESIS, NANOPARTICLES, PARTICLES, NANOSTRUCTURES, INTERFACE, BAZRO3

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MLA
Cayado, P., et al. “Epitaxial YBa2Cu3O7-x Nanocomposite Thin Films from Colloidal Solutions.” SUPERCONDUCTOR SCIENCE & TECHNOLOGY, vol. 28, no. 12, 2015.
APA
Cayado, P., De Keukeleere, K., Garzón, A., Perez-Mirabet, L., Meledin, A., De Roo, J., … Obradors, X. (2015). Epitaxial YBa2Cu3O7-x nanocomposite thin films from colloidal solutions. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 28(12).
Chicago author-date
Cayado, P, Katrien De Keukeleere, A Garzón, L Perez-Mirabet, A Meledin, Jonathan De Roo, F Vallés, et al. 2015. “Epitaxial YBa2Cu3O7-x Nanocomposite Thin Films from Colloidal Solutions.” SUPERCONDUCTOR SCIENCE & TECHNOLOGY 28 (12).
Chicago author-date (all authors)
Cayado, P, Katrien De Keukeleere, A Garzón, L Perez-Mirabet, A Meledin, Jonathan De Roo, F Vallés, B Mundet, Hannes Rijckaert, Glenn Pollefeyt, M Coll, S Ricart, A Palau, J Gázquez, J Ros, G Van Tendeloo, Isabel Van Driessche, T Puig, and X Obradors. 2015. “Epitaxial YBa2Cu3O7-x Nanocomposite Thin Films from Colloidal Solutions.” SUPERCONDUCTOR SCIENCE & TECHNOLOGY 28 (12).
Vancouver
1.
Cayado P, De Keukeleere K, Garzón A, Perez-Mirabet L, Meledin A, De Roo J, et al. Epitaxial YBa2Cu3O7-x nanocomposite thin films from colloidal solutions. SUPERCONDUCTOR SCIENCE & TECHNOLOGY. 2015;28(12).
IEEE
[1]
P. Cayado et al., “Epitaxial YBa2Cu3O7-x nanocomposite thin films from colloidal solutions,” SUPERCONDUCTOR SCIENCE & TECHNOLOGY, vol. 28, no. 12, 2015.
@article{7038555,
  abstract     = {A methodology of general validity to prepare epitaxial nanocomposite films based on the use of colloidal solutions containing different crystalline preformed oxide nanoparticles (ex situ nanocomposites) is reported. The trifluoroacetate (TFA) metal-organic chemical solution deposition route is used with alcoholic solvents to grow epitaxial YBa2Cu3O7 (YBCO) films. For this reason stabilizing oxide nanoparticles in polar solvents is a challenging goal. We have used scalable nanoparticle synthetic methodologies such as thermal and microwave-assisted solvothermal techniques to prepare CeO2 and ZrO2 nanoparticles. We show that stable and homogeneous colloidal solutions with these nanoparticles can be reached using benzyl alcohol, triethyleneglycol, nonanoic acid, trifluoroacetic acid or decanoic acid as protecting ligands, thereby allowing subsequent mixing with alcoholic TFA solutions. An elaborate YBCO film growth analysis of these nanocomposites allows the identification of the different relevant growth phenomena, e.g. nanoparticles pushing towards the film surface, nanoparticle reactivity, coarsening and nanoparticle accumulation at the substrate interface. Upon mitigation of these effects, YBCO nanocomposite films with high self-field critical currents (J(c) similar to 3-4MAcm(-2) at 77 K) were reached, indicating no current limitation effects associated with epitaxy perturbation, while smoothed magnetic field dependences of the critical currents at high magnetic fields and decreased effective anisotropic pinning behavior confirm the effectiveness of the novel developed approach to enhance vortex pinning. In conclusion, a novel low cost solution-derived route to high current nanocomposite superconducting films and coated conductors has been developed with very promising features.},
  articleno    = {124007},
  author       = {Cayado, P and De Keukeleere, Katrien and Garzón, A and Perez-Mirabet, L and Meledin, A and De Roo, Jonathan and Vallés, F and Mundet, B and Rijckaert, Hannes and Pollefeyt, Glenn and Coll, M and Ricart, S and Palau, A and Gázquez, J and Ros, J and Van Tendeloo, G and Van Driessche, Isabel and Puig, T and Obradors, X},
  issn         = {0953-2048},
  journal      = {SUPERCONDUCTOR SCIENCE & TECHNOLOGY},
  keywords     = {nanocomposite,coated conductor,colloidal solution,nanoparticle,chemical solution,YBa2Cu3O7,HIGH-TEMPERATURE SUPERCONDUCTORS,METAL-OXIDE NANOCRYSTALS,COATED CONDUCTORS,CURRENT DENSITIES,SCALE SYNTHESIS,NANOPARTICLES,PARTICLES,NANOSTRUCTURES,INTERFACE,BAZRO3},
  language     = {eng},
  number       = {12},
  pages        = {18},
  title        = {Epitaxial YBa2Cu3O7-x nanocomposite thin films from colloidal solutions},
  url          = {http://dx.doi.org/10.1088/0953-2048/28/12/124007},
  volume       = {28},
  year         = {2015},
}

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