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- Title
Excess conductivity analyses of (CuTl)BaCaCuO thin film samples synthesized at different temperatures and post-annealed in flowing nitrogen atmosphere.
- Authors
Khan, Nawazish A.; Safeer, Sayed Hamza; Khan, M. Nasir; Rahim, M.; Hassan, Najmul
- Abstract
The (CuTl)BaCaCuO thin films were synthesized at 895, 905 and 920 °C. These films are c-axis oriented and have shown tetragonal structure. The samples have been investigated for excess conductivity analysis. The analyses are carried out by following Aslamazov-Larkin theory. It is observed that the values of ξ, v, λ, J decrease, but that of B(T), B(T), J(0) increase with the increase of synthesis temperature. However, with the post-annealing of the samples at 100, 300 and 400 °C, the values of ξ(0), v, τ and J increase but, the values of B(T), B(T) and J(0) suppress with the increasing annealing temperature. It is proposed that with the higher synthesis temperature thallium defects are created in the charge reservoir layer that act as pinning centers whereas with post-annealing of the samples oxygen defects are removed. The former enhances whereas the later promotes suppression of B(T), B(T), J(0) parameters in (CuTl)BaCaCuO thin films.
- Subjects
SUPERCONDUCTING thin films; THALLIUM; COPPER; ELECTRIC conductivity; SURFACE resistance
- Publication
Journal of Materials Science: Materials in Electronics, 2018, Vol 29, Issue 3, p2209
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-017-8134-5