ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Single-target RF magnetron sputtering was used to deposit superconducting thin films of Bi-Sr-Ca-Cu-O with a Tc0 above 80 K. Varying PO2 modified the concentrations of Bi, Cu, and O in the films by 10%–20%. Higher annealing temperatures, especially with brief melting, favored the formation of the higher Tc phases. Tetragonal phases (6- and 75-K Tc ), with a=3.8097 A(ring), c=24.607 A(ring), and Bi2 Sr2 CuO6 composition, and a=3.812 A(ring), c=30.66 A(ring), and Bi2 Sr2−x Ca1+x Cu2 O8 composition, were identified. 70–84 K films contained large proportions of a new tetragonal phase, with a=3.81 A(ring) and c=55.23 A(ring).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.342389
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