Superconducting Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub 8} thin films prepared by post-annealing in a flow-through multiple-zone furnace
- and others
Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub 8} thin films were prepared for the first time by use of a multiple-zone flow-through thallination process. Thallous oxide was volatilized from condensed thallium oxide in a low temperature source zone and convectively transported to a higher temperature thallination zone in which initially amorphous Ba{sub 2}CaCu{sub 2}O{sub 5} precursor films were located. By careful control of the source temperature, film temperature, flow rate, anneal time, and rates of heat up and cool down, smooth Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub 8} thin films were prepared on (100) LaAlO{sub 3} with the following properties: inductive {Tc} of 107.6 K and 80% transition width of 1.3 K, transport J{sub c} at 75 K of 1.3 {times} 10{sup 5} A/cm{sup 2}, and R{sub s} at 10 GHz and 80 K of 1.3 m{Omega}. The scalability of the process to large area film processing was demonstrated by the preparation of Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub 8} thin films on LaAlO{sub 3} three-inch diameter wafers.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 10194314
- Report Number(s):
- LA-UR-94-3568; CONF-941013-3; ON: DE95002745; TRN: 94:023915
- Resource Relation:
- Conference: Applied superconductivity conference,Boston, MA (United States),16-21 Oct 1994; Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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