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- Title
Role of Mobile Charge Carriers and Fluctuation Induced Conductivity in (CuTlK)BaCaCuZnO Superconductor.
- Authors
Mumtaz, M.; Khan, Nawazish A.; Hasnain, S. M.; Younis, Adnan
- Abstract
The main role played by mobile carriers and fluctuation induced conductivity (FIC) in (CuTlK)BaCaCuZnO ( x=0, 0.25) superconductor samples are analyzed in the light of the Aslamazov-Larken (AL) theory. The enhancement of three-dimensional (3D) conductivity and grain size is achieved with K-doping at Tl sites in the (CuTlK)BaO charge reservoir layer, which are further improved by post-annealing the samples in oxygen. The improvement of these factors causes the increase in cross-over temperature ( T), zero resistivity critical temperature { T( R=0)} and T(onset) of diamagnetism to their higher values. We have also evaluated the exponents ( λ and λ), zero temperature coherence lengths ξ(0), and interlayer coupling ( J) for these samples and tried to correlate them to the superconductivity order parameters.
- Subjects
FLUCTUATIONS (Physics); ELECTRIC conductivity; SUPERCONDUCTORS; SUPERCONDUCTIVITY; SEMICONDUCTOR doping
- Publication
Journal of Superconductivity & Novel Magnetism, 2011, Vol 24, Issue 6, p1939
- ISSN
1557-1939
- Publication type
Article
- DOI
10.1007/s10948-011-1148-y