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
- Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- 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 Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- AC05-96OR22464
- OSTI ID:
- 544237
- Journal Information:
- Journal of Materials Research, Vol. 12, Issue 3; Other Information: PBD: Mar 1997
- Country of Publication:
- United States
- Language:
- English
Similar Records
Importance of controlling the Tl-oxide partial pressure throughout the processing of TlBa{sub 2}CaCu{sub 2}O{sub 7} thin films
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