Josephson transport in Tl-cuprate bicrystal weak links
Journal Article
·
· Journal of Low Temperature Physics
- Univ. of Goeteborg and Chalmers Univ. of Technology (Sweden); and others
Superconducting epitaxial Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub 8} (Tl-2212) and Tl{sub 2}Ba{sub 2}CuO{sub 6} (Tl-2201) thin films are synthesized on single crystal and bicrystal LaAlO{sub 3} substrates by an ex-situ process. Tl-2212 films were optically smooth, with T{sub c}`s from 105 to 108K and {Delta}T{sub c} <2K, J{sub c} reaching 2 x 10{sup 6}A/cm{sup 2} at 77K. Tl-2201 films exhibited tetragonal or orthorhombic symmetry depending on the thallium content. The T{sub c} of the as-synthesized Tl-2201 films was in the range 40-55K. By oxygen depletion, T{sub c} was increased by 15 - 20 K. Properties of weak links in Tl-2212 and Tl-2201 thin films are reported.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 443656
- Report Number(s):
- CONF-960808-; ISSN 0022-2291; TRN: 97:000865-0029
- Journal Information:
- Journal of Low Temperature Physics, Vol. 105, Issue 5-6; Conference: 3. international conference on physics and chemistry of molecular and oxide superconductors, Karlsruhe (Germany), 2-6 Aug 1996; Other Information: PBD: Dec 1996
- Country of Publication:
- United States
- Language:
- English
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