Title :
Superconducting property of Y1Ba2Cu3 Ox films formed on silver substrates by continuous chemical vapor deposition technique
Author :
Onabe, Kazunori ; Akata, Hiroyuki ; Higashiyama, Kazutoshi ; Nagaya, Shigeo ; Saitoh, Takashi
Author_Institution :
Fujikura Ltd., Tokyo, Japan
fDate :
3/1/2001 12:00:00 AM
Abstract :
A new CVD system equipped with a triple-reactor was developed to improve the forming rate of the superconducting tape. Three-layered Y123 films with good crystallinity covering the total thickness were obtained directly on roll milled non-textured Ag tapes by using this triple-stage CVD system. 11 m long Y123 tape with a uniform Jc of 3.0×104 A/cm2 at 77 K, 0 T was successfully prepared on roll milled non-textured Ag tape at a forming rate of 3.0 m/h, Y123 films formed directly on the cube-textured Ag(100)<001> tapes showed two types of orientation, cube-on-cube and diagonal-on-cube, between Y123 and Ag. On the other hand, Sm123 and Nd123 films showed the simple orientation, cube-on-cube, so these films were expected to improve the in-plane alignment of Y123 film by inserting them as the intermediate layer
Keywords :
barium compounds; chemical vapour deposition; critical current density (superconductivity); crystal orientation; high-temperature superconductors; superconducting tapes; superconducting thin films; yttrium compounds; 0 T; 77 K; Ag; CVD system; Jc; NdBa2Cu3O7; Sm123; SmBa2Cu3O7; Y1Ba2Cu3O; YBa2Cu3Ox films; continuous chemical vapor deposition technique; crystallinity; cube-on-cube orientation; cube-textured Ag(100)<001> tapes; diagonal-on-cube orientation; in-plane alignment; orientation; roll milled non-textured Ag tapes; roll milled nontextured Ag tape; silver substrates; superconducting tape; three-layered Y123 films; triple-reactor; triple-stage CVD system; Control systems; Pressure control; Silver; Solvents; Strain measurement; Substrates; Superconducting epitaxial layers; Superconducting films; Telephony; Temperature control;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
