Abstract
YBa2Cu3O7-δ (YBCO) thin films were prepared in situ on LaAlO3(100) single crystal substrates by spray pyrolysis. The deposition temperature was changed from 800°C to 880°C and all the samples were annealed at a lower temperature for different times. The resistivity versus temperature measurements showed that the film deposited at 880°C and annealed at 550°C for 1 h has the highest superconducting transition temperature (Tc) of about 90 K with the transition width (ΔTc) of 2 K. In addition, critical current density measurements of this sample were performed which revealed a critical current density (Jc) of about 104 A/cm2 at 77 K. Moreover, x-ray diffraction and atomic force microscopy analyses showed a c-axis growth and micro-sized grains of the films. Analysis of the normal state behavior of the samples revealed that 3D variable range hopping and the Aslamazov–Larkin model of fluctuation conductivity can explain the conduction of the under-doped and optimum-doped YBCO thin films.
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Partial financial support by the research council of the University of Tehran is acknowledged.
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Rasti, M., Mohammadizadeh, M.R. Superconducting and Normal State Properties of Spray-Pyrolyzed YBCO Thin Films. J. Electron. Mater. 52, 5485–5491 (2023). https://doi.org/10.1007/s11664-023-10466-y
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DOI: https://doi.org/10.1007/s11664-023-10466-y