Title :
Preparation of high quality YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// thick films on flexible Ni-based alloy substrates with textured buffer layers
Author :
Wu, X.D. ; Foltyn, S.R. ; Arendt, P. ; Townsend, J. ; Campbell, I.H. ; Tiwari, P. ; Jia, Q.X. ; Willis, J.O. ; Maley, M.P. ; Coulter, J.Y. ; Peterson, D.E.
Author_Institution :
Supercond. Technol. Center, Los Alamos Nat. Lab., NM, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
High current YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// (YBCO) thick films on flexible nickel substrates with textured buffer layers were fabricated. Highly textured yttria-stabilized-zirconia (YSZ) buffer layers were deposited by using ion beam assisted deposition (IBAD). Pulsed laser deposited YBCO films were not only c-axis oriented with respect to the film surface but also strongly in-plane textured. The in-plane mosaic spread of YBCO films was/spl sim/10/spl deg/. A critical current density of 8/spl times/10/sup 5/ A/cm/sup 2/ was obtained at 75 K and zero field for thin YBCO films. It was also demonstrated that thick YBCO films with a high critical current and excellent magnetic field dependence at liquid nitrogen temperature can be obtained on flexible nickel substrates by using the textured buffer layers. Issues encountered in producing the films were discussed.<>
Keywords :
barium compounds; critical current density (superconductivity); high-temperature superconductors; pulsed laser deposition; thick films; vapour deposited coatings; yttrium compounds; 75 K; YBa/sub 2/Cu/sub 3/O/sub 7/; ZrO:Y/sub 2/O/sub 3/; critical current density; flexible Ni-based alloy substrates; high current YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// thick films; high quality YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// thick films preparation; high temperature superconductors; highly textured yttria-stabilized-zirconia; in-plane mosaic spread; ion beam assisted deposition; magnetic field dependence; pulsed laser deposited films; textured buffer layers; zero field; Buffer layers; Ion beams; Magnetic films; Nickel; Optical pulses; Pulsed laser deposition; Substrates; Surface texture; Thick films; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
