(La, Sr) TiO3 as a Conductive Buffer for High-Temperature Superconducting Coated Conductors
- ORNL
- University of Florida
The perovskite (La,Sr)TiO{sub 3} was investigated as a possible conducting oxide buffer layer for high-temperature superconducting coated conductors. In particular, the growth of LSTO films on SrTiO{sub 3} single crystal, Ni-W, and Cu tapes was performed using pulsed laser deposition. LSTO films were grown in vacuum at a temperature of 750 C. From the {omega}-scan, the FWHM values of LSTO (004) on Ni-W and Cu tape were 7.48{sup o} and 6.21{sup o}, which showed improvement in the out-of-plane texture for the film as compared to the substrate metal tapes. The {var_phi}-scans through the LSTO (112) on both metal tapes indicated in-plane-aligned LSTO grains. YBa{sub 2}Cu{sub 3}O{sub 7} films were deposited on all three structures by pulsed laser ablation; samples on LSTO/SrTiO{sub 3} single crystals had a superconducting transition of 91 K and a Jc value of 3.0 MA/cm{sup 2}. This shows that LSTO is a good template for the YBCO film in terms of epitaxial and chemically stable growth.
- Research Organization:
- Oak Ridge National Laboratory (ORNL)
- Sponsoring Organization:
- OE USDOE - Office of Electric Transmission and Distribution
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1003080
- Journal Information:
- IEEE Transactions on Applied Superconductivity, Journal Name: IEEE Transactions on Applied Superconductivity Journal Issue: 2 Vol. 15; ISSN 1051-8223
- Country of Publication:
- United States
- Language:
- English
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