Title :
Textured buffer layers for YBCO coated conductors by continuous sol-gel processing
Author :
Okuyucu, H. ; Celik, E. ; Ramazanoglu, M.K. ; Akin, Y. ; Mutlu, I.H. ; Sigmund, W. ; Crow, J.E. ; Hascicek, Y.S.
Author_Institution :
Nat. High Magnetic Field Lab., Tallahassee, FL, USA
fDate :
3/1/2001 12:00:00 AM
Abstract :
In order to develop alternative buffer layers for YBCO coated conductors, RE2O3 (RE=La, Pr, Sm, Eu, Gd, Tb, Ho, Yb, and Lu) thin films were studied as candidate materials. Buffer layers were grown on Ni tapes using organometallic compounds that are 2,4-pentanedionates, isopropoxides, and acetates by a continuous, non-vacuum sol-gel process. Films were annealed at 900°C-1200°C under 4%H2-Ar gas mixture. The buffer layers were characterized by means of ESEM, SEM, EDS, XRD and pole figure analysis. Textured, pinhole free crack free, continuous buffer layers were obtained by using 2,4-pentanedionates
Keywords :
X-ray diffraction; barium compounds; high-temperature superconductors; rare earth compounds; scanning electron microscopy; sol-gel processing; superconducting thin films; texture; yttrium compounds; 2,4-pentanedionates; 900 to 1200 degC; EDS; ESEM; Eu2O3; Gd2O3; H2-Ar; H2-Ar gas mixture; HTSC; Ho2O3; La2O3; Lu2O3; Ni; Ni tapes; Pr2O3; R2O3 thin films; SEM; Sm2O3; Tb2O3; XRD; YBaCuO; YBaCuO coated conductors; Yb2O3; acetates; annealing; continuous sol-gel processing; isopropoxides; organometallic compounds; pole figure; textured buffer layers; Buffer layers; Conductive films; Conductors; High temperature superconductors; Laboratories; Magnetic fields; Postal services; Substrates; Telephony; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
