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 Lab., 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
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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Mon Nov 30 23:00:00 EST 1998
· Journal of Materials Research
·
OSTI ID:292709
Preparation and properties of Tl[sub 2]Ba[sub 2]CaCu[sub 2]O[sub 8] thin films
Journal Article
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Mon Aug 01 00:00:00 EDT 1994
· Journal of Superconductivity; (United States)
·
OSTI ID:6765653
Preparation and characterization of Tl sub 2 Ba sub 2 CaCu sub 2 O sub 8 films on (100) LaAlO sub 3
Conference
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Thu Feb 28 23:00:00 EST 1991
· IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)
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OSTI ID:5932332