Title :
In-plane alignment of YBa/sub 2/Cu/sub 3/O/sub 7-y/ films realized by CeO/sub 2/ buffer layer on textured Ag{100}<001> tapes
Author :
Takahashi, Y. ; Matsumoto, K. ; Kim, S.-B. ; Hirabayashi, I. ; Akata, H. ; Higashiyama, Koryo
Author_Institution :
Supercond. Res. Lab., ISTEC, Nagoya, Japan
fDate :
6/1/1999 12:00:00 AM
Abstract :
Homogeneous in-plane aligned YBa/sub 2/Cu/sub 3/O/sub 7-y/ (YBCO) films on long metallic substrates are required for power applications. In order to establish in-plane aligned YBCO films, we have been studying Ag{100}<001> textured tapes buffered with a [001]-oriented CeO/sub 2/ layer. The YBCO and CeO/sub 2/ films were deposited by pulsed laser deposition (PLD). The CeO/sub 2/ deposition rate was 900 /spl Aring//min. The CeO/sub 2/ films on Ag{100}<001> textured substrates mere [100]-oriented and highly in-plane aligned. The YBCO films deposited by PLD on CeO/sub 2/ buffered Ag substrates also have c-axis oriented and good in-plane alignment. T/sub c/ and J/sub c/ values of the YBCO films were 81 K and 1/spl times/10/sup 4/ A/cm/sup 2/ at 77 K, respectively.
Keywords :
barium compounds; cerium compounds; high-temperature superconductors; pulsed laser deposition; silver; superconducting thin films; yttrium compounds; 77 K; 81 K; Ag; CeO/sub 2/; CeO/sub 2/ buffer layer; YBa/sub 2/Cu/sub 3/O/sub 7-y/ films; YBa/sub 2/Cu/sub 3/O/sub 7/; high temperature superconductor; in-plane alignment; pulsed laser deposition; textured Ag{100}<001> tapes; Annealing; Atmosphere; Buffer layers; Critical current density; Scanning electron microscopy; Substrates; Surface morphology; Temperature dependence; X-ray diffraction; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
