Growth of highly oriented TlBa{sub 2}Ca{sub 2}Cu{sub 3}O{sub 9{minus}y} superconducting films on Ag substrates using a dip-coated barium calcium copper oxide sol-gel precursor
- Oak Ridge National Lab., TN (United States). Chemical and Analytical Sciences Div.
Thin films of ba{sub 2}Ca{sub 2}Cu{sub 3}O{sub 7}, a precursor of TlBa{sub 2}Ca{sub 2}Cu{sub 3}O{sub 9{minus}y}, were prepared by sol-gel synthesis from an all-alkoxide solution. The barium and calcium precursors were the respective metals reacted with 2-methoxyethanol, and the copper precursor was copper methoxide complexed by triethanolamine. Silver substrates were coated using the sol-gel solution by dip-coating. Subsequent processing included a low-temperature drying step (600 C), repeated coating to provide the desired thickness, heat treatment at 850 C in oxygen to remove carbon, and reaction at 860 C in a two-zone thallination furnace to produce a TlBa{sub 2}Ca{sub 2}Cu{sub 3}O{sub 9{minus}y} superconducting film. These films were strongly c-axis-aligned, had a zero-resistance temperature (T{sub c}) of 110 K, and a critical-current density (J{sub c}) of 1.9 {times} 10{sup 4} A/cm{sup 2} at 77 K and zero magnetic field.
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 116109
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 9 Vol. 78; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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