Growth of TlBa{sub 2}Ca{sub 2}Cu{sub 3}O{sub 9{minus}y} superconducting films with local biaxial alignment extending up to 5 mm on Ag substrates using a spray pyrolysis technique

Journal Article · Sat Mar 01 04:00:00 EST 1997 · Journal of Materials Research

DOI:https://doi.org/10.1557/JMR.1997.0094· OSTI ID:544237

Paranthaman, M ^[1]; List, F A; Goyal, A; Specht, E D ^[2]; Vallet, C E ^[1]; Kroeger, D M ^[2]; Christen, D K ^[3]

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1. Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
2. Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
3. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

We report superconducting properties of TlBa{sub 2}Ca{sub 2}Cu{sub 3}O{sub 9{minus}y} (Tl-1223) thick films grown on smooth and rough Ag substrates. Thallium-free precursor films of the type Ba{sub 2}Ca{sub 2}Cu{sub 3}Ag{sub 0.37}O{sub 7} were deposited on Ag substrates using a spray pyrolysis technique followed by post-thallination in a two-zone furnace. XRD results showed the presence of a c-axis aligned Tl-1223 films and some degree of local in-plane texture (often referred as a colony microstructure). The microstructure of the Ag surface dictates the growth behavior of Tl-1223 films. The transport critical-current densities (J{sub c}) for Tl-1223 films grown on smooth and rough Ag substrates were {approximately}65000 A/cm{sup 2} and {approximately}37000 A/cm{sup 2}, respectively, at 77 K and zero field. The films grown on smooth Ag substrates were strongly linked and had good in-field properties with a J{sub c} value of {approximately}10{sup 4} A/cm{sup 2} at 77 K and 0.5 T. {copyright} {ital 1997 Materials Research Society.}

• Research Organization: Oak Ridge National Laboratory
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 544237
• Journal Information: Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 3 Vol. 12; ISSN JMREEE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
CALCIUM OXIDES
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL GROWTH
HIGH-TC SUPERCONDUCTORS
MICROSTRUCTURE
SILVER
SUBSTRATES
SUPERCONDUCTING FILMS
TEXTURE
THALLIUM OXIDES