ISSN:
1572-9605
Keywords:
Superconductor
;
thallium
;
Tl-Ba-Ca-Cu-O
;
film
;
growth
Source:
Springer Online Journal Archives 1860-2000
Topics:
Electrical Engineering, Measurement and Control Technology
,
Physics
Notes:
Abstract We discuss two methods tor the ex-situ furnace growth of pure TIBaCaCuO superconducting thin films on LaAlO3(100) substrates. The traditional approach of “crucible processing” is used to grow high-quality films of several of the TIBaCaCuO phases. “Two-zone processing” promises greater thermodynamic control, yet film properties from optimized films are not as good as those grown from crucibles. The transport kinetics of Tl-oxide vapor from a source to the film surface appears to be a dominant factor. The best results are from single-phase Tl-1212 and Tl-2212 thin films. Tc's are high and sharp, Jc's 〉 1 × 107 A/cm2 at 5 K, and surface morphologies are relatively smooth.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022687408646
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