Epitaxial Growth of YBa2Cu3O7 Films onto LaAlO3 (100) by Using Oxalates

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.

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YBa2Cu3O7 films grown onto SrTiO3 and YSZ substrates by chemical solution deposition of trifluoroacetates

Domínguez

Valladares

Cornejo

et al. 2021

J Electroceram

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Texture and magnetic anisotropy of YBa2Cu3O7-x film on MgO substrate

Cornejo

Valladares

Barnes

et al. 2020

J Mater Sci: Mater Electron

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The texture and magnetic anisotropy of a YBa2Cu3O7-x (YBCO) film growth onto a MgO substrate are analyzed in order to understand the relation between them. X-ray diffraction shows the presence of the (00l) reflections from the YBCO layer with a grain’s fraction value 98%. Rocking Curves (RC) measurements reveal an out-of-plane texture with a full width at the half maximum of 0.81°, revealing a high uniaxial texture in the YBCO film. The temperature dependence of the susceptibility measurements obtained under many applied fields along Hext ||c-axis and Hext||ab-plane reveals strong relationship between the uniaxial texture and the magnetic anisotropy, confirming the high ordering of the CuO2 superconducting planes. In addition, the critical current density values are obtained from the hysteresis loops and compared to similar YBCO films with uniaxial and biaxial texture reported elsewhere.

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Texture and terahertz analysis of YBa₂Cu₃O₇ grown onto LaAlO₃ by the chemical solution deposition technique

Cornejo

Valladares

Kamboj

et al. 2021

Heat Treatment and Surface Engineering

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Epitaxial Growth of YBa2Cu3O7 Films onto LaAlO3 (100) by Using Oxalates

Cited by 3 publications

References 7 publications

YBa2Cu3O7 films grown onto SrTiO3 and YSZ substrates by chemical solution deposition of trifluoroacetates

YBa2Cu3O7 films grown onto SrTiO3 and YSZ substrates by chemical solution deposition of trifluoroacetates

Texture and magnetic anisotropy of YBa2Cu3O7-x film on MgO substrate

Texture and terahertz analysis of YBa₂Cu₃O₇ grown onto LaAlO₃ by the chemical solution deposition technique

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Epitaxial Growth of YBa2Cu3O7 Films onto LaAlO3 (100) by Using Oxalates

Cited by 3 publications

References 7 publications

YBa2Cu3O7 films grown onto SrTiO3 and YSZ substrates by chemical solution deposition of trifluoroacetates

YBa2Cu3O7 films grown onto SrTiO3 and YSZ substrates by chemical solution deposition of trifluoroacetates

Texture and magnetic anisotropy of YBa2Cu3O7-x film on MgO substrate

Texture and terahertz analysis of YBa2Cu3O7 grown onto LaAlO3 by the chemical solution deposition technique

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Product

Resources

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Texture and terahertz analysis of YBa₂Cu₃O₇ grown onto LaAlO₃ by the chemical solution deposition technique