Title :
Preparation of Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O thin films
Author :
Auge, J. ; Roskos, H.G. ; Kurz, H.
Author_Institution :
Inst. of Semicond. Electron., Tech. Hochschule Aachen, Germany
fDate :
6/1/1995 12:00:00 AM
Abstract :
Since the discovery of the high-T/sub c/ superconductors, the main technical interest focuses on Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-x/ (YBCO) and Bi/sub 2/Sr/sub 2/Ca/sub 1/Cu/sub 2/O/sub 8+/spl delta// (BSCCO-2212) because of their high transition temperature and their reproducible fabrication. YBCO is mainly used today because of the relative ease of preparation. Thin BSCCO films can be deposited with nearly the right stoichiometry, but there are very few publications which report a transition temperature near the optimum value of 94 K. We report the optimization of the surface of YBCO thin films. The optimization of BSCCO-2212 films with respect to the right oxygen content is presented as well as preliminary results for Y-doped BSCCO films.<>
Keywords :
barium compounds; bismuth compounds; calcium compounds; high-temperature superconductors; sputter deposition; stoichiometry; strontium compounds; superconducting thin films; superconducting transition temperature; surface structure; yttrium compounds; 94 K; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/; BiSrCaCuO:Y; DC sputtering; O content; YBa/sub 2/Cu/sub 3/O/sub 7/; high transition temperature; high-T/sub c/ superconductors; magnetron sputtering; reproducible fabrication; resistivity curve; stoichiometry; superconducting thin films; surface morphology; surface optimization; Bismuth compounds; Fabrication; High temperature superconductors; Sputtering; Strontium; Superconducting thin films; Superconducting transition temperature; Superconductivity; Transistors; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
