Title :
MOCVD techniques for the production of coated conductors
Author :
Stadel, Oliver ; Schmidt, Juergen ; Liekefett, Monika ; Wahl, Georg ; Gorbenko, Oleg Yu ; Kaul, Andrey R.
Author_Institution :
Inst. of Surface Technol., Tech. Univ. of Braunschweig, Germany
fDate :
6/1/2003 12:00:00 AM
Abstract :
New deposition techniques are used for MOCVD of YBCO-, buffer- and protective layers in a reel to reel system. This system consists of three tape reactors and evaporators. So it is possible to deposit the superconductor, the buffer layer and a protective layer in situ in one vacuum system. The operativeness of the reactors were tested separately. In the YBCO reactor superconducting films have been deposited with critical current densities over 1 MA/cm2 at 77 K on moved textured Nickel tapes at a transport velocity of 4 m/h. Textured Ni substrates were coated in the buffer layer reactor with CeO2 and in first experiments a Ag layer was deposited by MOCVD onto the YBCO film.
Keywords :
MOCVD coatings; barium compounds; cerium compounds; critical current density (superconductivity); high-temperature superconductors; nickel; silver; superconducting tapes; superconducting thin films; yttrium compounds; 77 K; Ag; MOCVD; Ni; YBCO; YBa2Cu3O7; buffer layer; coated conductors; critical current densities; deposition techniques; evaporators; high temperature superconductor; moved textured Ni tapes; protective layer; tape reactors; transport velocity; Buffer layers; Conductors; Inductors; MOCVD; Nickel; Production; Protection; Superconducting epitaxial layers; Superconducting films; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.811839
