Title :
YBa/sub 2/Cu/sub 3/O/sub 7/ thin films on nanocrystalline diamond films for HTSC bolometer
Author :
Cui, G. ; Beetz, C.P., Jr. ; Boerstler, R. ; Steinbeck, J.
Author_Institution :
Adv. Technol. Mater. Inc., Danbury, CT, USA
fDate :
3/1/1993 12:00:00 AM
Abstract :
Superconducting YBa/sub 2/Cu/sub 3/O/sub 7-x/ films on nanocrystalline diamond thin films have been fabricated. A composite buffer layer system consisting of diamond/Si/sub 3/N/sub 4//YSZ/YBCO was explored for this purpose. The as-deposited YBCO films were superconducting with T/sub c/ of approximately 84 K and a relatively narrow transition width of approximately 8 K. Scanning electron microscope cross sections of the films showed very sharp interfaces between diamond/Si/sub 3/N/sub 4/ and between Si/sub 3/N/sub 4//YSZ. The deposited YBCO film has a surface roughness of approximately 1000 AA, which is suitable for high-temperature superconductive (HTSC) bolometer fabrication. It was also found that preannealing of the nanocrystalline diamond thin films at high temperature was very important for obtaining high-quality YBCO films.<>
Keywords :
barium compounds; bolometers; high-temperature superconductors; superconducting junction devices; superconducting thin films; yttrium compounds; 84 K; C; HTSC bolometer; YBa/sub 2/Cu/sub 3/O/sub 7/ thin films; composite buffer layer system; high temperature superconductor; nanocrystalline diamond films; Buffer layers; High temperature superconductors; Rough surfaces; Scanning electron microscopy; Semiconductor films; Superconducting epitaxial layers; Superconducting films; Superconducting thin films; Surface roughness; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
