Title :
Thick sol-gel derived YBa2Cu3O7-δ films
Author :
Dawley, J.T. ; Clem, P.G. ; Siegal, M.P. ; Overmyer, D.L. ; Rodriguez, M.A.
Author_Institution :
Sandia Nat. Labs., Albuquerque, NM, USA
fDate :
3/1/2001 12:00:00 AM
Abstract :
YBa2Cu3O7-δ films have been prepared by spin-coating solutions of metal acetates dissolved in trifluoroacetic acid/methanol and trifluoroacetic acid/isopropanol/1,3 propanediol onto LaAlO3(100) substrates. By using a rapid, low pO2 pyrolysis process, high-quality diol films (0.25 μm thick) with Jc values as high as 14 MA/cm2 and 2 MA/cm2 at 7 K and 77 K, respectively, were fabricated in one tenth the time, compared to conventional processing schemes. The effect of multicoating, in order to reach YBCO film thicknesses of 1.5 μm, on the Jc was also studied
Keywords :
barium compounds; critical current density (superconductivity); high-temperature superconductors; sol-gel processing; superconducting thin films; yttrium compounds; 1,3 propanediol; 1.5 mum; 7 K; 77 K; LaAlO3; LaAlO3(100) substrates; YBa2Cu3O7; critical current density; isopropanol; metal acetate solutions; methanol; pyrolysis; sol-gel synthesis; spin-coating; thin films; trifluoroacetic acid; Coatings; Conductive films; Crystallization; Large-scale systems; Methanol; Stress; Superconducting films; Thick films; Viscosity; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
