YBa2Cu3O7 films grown onto SrTiO3 and YSZ substrates by chemical solution deposition of trifluoroacetates
| Autor: | Crispin H. W. Barnes, L. Sanchez Sovero, J. Flores Santibañez, A. Bustamante Domínguez, H. Sanchez Cornejo, A. M. Osorio-Anaya, L. De Los Santos Valladares |
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| Rok vydání: | 2021 |
| Předmět: |
Superconductivity
Materials science Analytical chemistry Sintering Substrate (electronics) Condensed Matter Physics Epitaxy Chemical solution deposition Superconductors Trifluoroacetates YBCO Electronic Optical and Magnetic Materials Full width at half maximum Mechanics of Materials Phase (matter) Materials Chemistry Ceramics and Composites purl.org/pe-repo/ocde/ford#2.05.00 [https] Crystallite Texture (crystalline) Electrical and Electronic Engineering |
| Zdroj: | CONCYTEC-Institucional Consejo Nacional de Ciencia Tecnología e Innovación Tecnológica instacron:CONCYTEC |
| ISSN: | 1573-8663 1385-3449 |
| DOI: | 10.1007/s10832-021-00256-5 |
| Popis: | We report the preparation and characterization of YBa2Cu3O7 (YBCO) films grown onto SrTiO3 and YSZ substrates by the trifluoroacetates chemical solution deposition method and following sintering with oxygen atmosphere at 860 °C. The X-ray diffraction (XRD) reveals (00ℓ) – oriented crystallites indicating epitaxial growth of the films in the c-direction. Despite granular morphology and the presence of Y2BaCuO5 and CuO as minor secondary phases, the technique shows the successful formation of the superconducting YBCO and preventing the formation of the unwanted BaCO3 phase. Rocking curve measurements of the (005) reflection for the YBCO/SrTiO3 was fitted with one Gaussian function with full width at the half maximum (FWHM) of 0.44° confirming that it consists of YBCO crystallites with different texture. For the sample grown on YSZ, the rocking curve was fitted with two Gaussian functions, one corresponding to the YBCO layer (FWHM = 0.4°) and another to the substrate (FWHM = 0.3°). The magnetic measurements taken in zero field cooling and field cooling modes confirm the formation of the superconducting YBCO with critical temperatures (TC) 91.8 and 85.7 K for the samples grown onto YSZ and SrTiO3, respectively. The critical current density (JC) curves indirectly calculated by using the Bean´s model from the M(T) loops were JC ~ 109 A/cm2 for the sample deposited onto YSZ and JC ~ 107A/cm2 for the YBCO deposited onto SrTiO3. Overall, the difference in TC and JC values between both samples could be related to their difference in oxygen content, porosity, hole concentration per Cu ion and the presence of secondary phases. |
| Databáze: | OpenAIRE |
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