Correlation Between Grain and Grain-Boundary Critical Current Densities in ex situ Coated Conductors with Variable YBa2Cu3O7- δ Layer Thickness
- ICMAB, Barcelona, Spain
- ORNL
The dependence of the percolative critical current density at low magnetic fields on YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (YBCO) layer thickness is studied by comparing grain, J{sub c}{sup G}, and grain-boundary, J{sub c}{sup GB}, critical current densities for a series of ex situ processed YBCO films on a RABiTS template. Both critical current densities decrease as a function of thickness and the values of J{sub c}{sup G} and J{sub c}{sup GB} show a clear correlation which suggests the existence of an interaction between Abrikosov-Josephson vortices on the grain boundaries and Abrikosov vortices in the bulk of the grains. This opens the possibility to improve J{sub c}{sup GB} by optimizing the pinning capabilities of the grains.
- 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:
- 1003145
- Journal Information:
- Applied Physics Letters, Vol. 88, Issue 12; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
BARIUM COMPOUNDS
CORRELATIONS
CRITICAL CURRENT
DENSITY
FILMS
FUNCTIONS
GRAIN BOUNDARIES
HIGH-TC SUPERCONDUCTORS
INTERACTIONS
LAYERS
MAGNETIC FIELDS
MAGNETIC FLUX
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
THICKNESS
THIN FILMS
VORTICES
YTTRIUM COMPOUNDS