Title :
Formation of epitaxial YBCO thin films by ex-situ processing of a polymerized complex
Author :
Bubendorfer, Andrea J. ; Kemmitt, Tim ; Campbell, Lily J. ; Long, Nick J.
Author_Institution :
Ind. Res. Ltd., Lower Hutt, New Zealand
fDate :
6/1/2003 12:00:00 AM
Abstract :
High Tc and Jc YBa2Cu3O7-x (YBCO) thin films have been formed by ex-situ processing of a spin coated organic sol-gel precursor based on a polymerized complex. To form the precursor we have reacted metal cations with a chelating organic acid, then formed polyesterified complexes through reaction with a polyhydroxy alcohol. This method permits a simple, cheap and reliable route to the fabrication of YBCO films. The value of Jc achieved for the film deposited onto a LaAlO3 [100] substrate at 77 K under a zero field is routinely as high as 0.25 MA/cm2 with Tc,zero of 90.6 K.
Keywords :
barium compounds; critical current density (superconductivity); high-temperature superconductors; sol-gel processing; spin coating; superconducting epitaxial layers; superconducting transition temperature; yttrium compounds; 77 K; LaAlO3; LaAlO3 [100] substrate; YBCO epitaxial thin film; YBa2Cu3O7; critical current density; critical temperature; ex-situ processing; high temperature superconductor; organic acid chelate; polyesterification; polyhydroxy alcohol; polymerized complex; spin coated organic sol-gel precursor; Costs; Fabrication; Hafnium; High temperature superconductors; Polymer films; Solvents; Substrates; Superconducting films; Superconductivity; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.811983
