Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
54 (1989), S. 957-959
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Dense oriented superconducting Bi-Sr-Ca-Cu-O films having zero resistance as high as 100 K have been made using a technique in which spray deposited and pyrolyzed films are densified by either melt quenching or flux sintering. The highest Tc films were those prepared with PbO as a dopant/flux on MgO substrates. Films without lead doping prepared on both BeO and MgO substrates yielded resistive transitions of 81–83 K. For these latter films, it was demonstrated that a subsequent anneal in argon enhanced the Tc to 87 K. The films were characterized by x-ray diffraction, scanning electron microscopy, and four-point probe resistance measurements. The critical current density of a film having a Tc of 81 K was 4000 A/cm2 at 78 K and 14 000 A/cm2 at 55K.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.100778
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