Grain and Grain-Boundary Critical Currents in Coated Conductors with Non-Correlating YBa2Cu3O7 and Substrate Grain-Boundary Networks
- ICMAB, Barcelona, Spain
- ORNL
- University of Wisconsin, Madison
- Los Alamos National Laboratory (LANL)
The superconducting grain-boundary (GB) network of coated conductors (CCs) is usually assumed to be a replica of the substrate network. In this letter, we analyze IBAD and RABITS CCs, where such replica either do or do not exist. We have analyzed the effect of GB overgrowth on the critical currents by quantifying the average superconducting grain size and determining the intragrain and grain-boundary critical current densities, J{sub c}{sup G} and J{sub c}{sup GB}. We have employed a recently developed inductive methodology enabling the simultaneous determination of these three parameters. We show that the percolative J{sub c}{sup GB} may be reduced by 50% if the GB networks do not correlate, while J{sub c}{sup G} and the grain pinning properties appear unaffected.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- OE USDOE - Office of Electric Transmission and Distribution
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 1003144
- Journal Information:
- Applied Physics Letters, Vol. 88, Issue 13; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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