Abstract
We report on the superconducting properties of TlBa2Ca2Cu3O9-y (Tl-1223) thick films grown on smooth and rough Ag substrates. Thallium-free precursor films of the type Ba2Ca2Cu3Ag0.37O7 were deposited on Ag substrates using a spray-pyrolysis technique followed by post-thallination in a two-zone furnace. X-ray diffraction (XRD) results showed the presence of c-axis aligned Tl-1223 films and some degree of local in-plane texture (often referred to as a colony microstructure). The microstructure of the Ag surface dictates the growth behavior of Tl-1223 films. The transport critical-current densities (Jc) for Tl-1223 films grown on smooth and rough Ag substrates were ∼ 65,000 A/cm2 and ∼ 37,000 A/cm2, 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 Jc value of ∼ 104 A/cm2 at 77 K and 0.5 T.
| Original language | English |
|---|---|
| Pages (from-to) | 619-623 |
| Number of pages | 5 |
| Journal | Journal of Materials Research |
| Volume | 12 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 1997 |
Funding
Thanks are due to John DeLuca at General Electric Company for helpful discussions. This research was sponsored by the Division of Materials Sciences, Office of Basic Energy Sciences and Office of Energy Efficiency and Renewable Energy, Office of Utility Technology-Superconductivity Program, performed at the Oak Ridge National Laboratory (ORNL) managed by Lockheed Martin Energy Research Corporation for the U.S. Department of Energy under Contract No. DE-AC05-96OR22464.