Title :
Fabrication of YBa2Cu3O7−x Superconducting Films Using Low-Fluorine-Content Solution
Author :
Zhao, Gaoyang ; Chen, Yuanqing ; Lei, Li ; Xue, Renzhong
Author_Institution :
Sch. of Material Sci. & Eng., Xi´´an Univ. of Technol.
fDate :
3/1/2007 12:00:00 AM
Abstract :
A new solution for fabrication of YBa2Cu3O 7-x (YBCO) superconducting films has been developed of Ba-TFA with nonfluorine Y and Cu organic salts being used as precursors. This new solution contains only 30% of the fluorine in an all-TFA solution, and duration of heat-treatment cycles is much shorter than that when an all-TFA solution is used. New YBCO-films are characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), and Raman spectroscopy. The results indicate that the as-prepared YBCO-films using the low-fluorine-content solution exhibit good textures and retain high oxygen content. Samples of these YBCO-films have good superconducting properties including high critical transition temperature Tc=90.5 K, sharp transition temperature DeltaTC<0.9 K, and enhanced critical current density Jc=3 MA/cm2
Keywords :
Raman spectra; X-ray diffraction; barium compounds; critical current density (superconductivity); heat treatment; high-temperature superconductors; scanning electron microscopy; superconducting thin films; superconducting transition temperature; texture; yttrium compounds; Raman spectroscopy; SEM; X-ray diffractometer; XRD; YBa2Cu3O7-x; critical current density; critical transition temperature; heat-treatment; low-fluorine-content solution; organic salts; scanning electron microscopy; superconducting film fabrication; superconducting properties; textures; Critical current density; Fabrication; Raman scattering; Scanning electron microscopy; Spectroscopy; Superconducting films; Superconducting transition temperature; X-ray diffraction; X-ray scattering; Yttrium barium copper oxide; Film; TFA; YBCO; sol-gel;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2006.887545
