Correlation Between Grain and Grain-Boundary Critical Current Densities in ex situ Coated Conductors with Variable YBa₂Cu₃O_{7- δ} Layer Thickness

Journal Article · Sat Dec 31 23:00:00 EST 2005 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2188044· OSTI ID:1003145

Palau, A. ^[1]; Puig, T. ^[1]; Obradors, X. ^[1]; Feenstra, Roeland ^[2]; Gapud, Albert Agcaoili ^[2]

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1. ICMAB, Barcelona, Spain
2. 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 Laboratory (ORNL)
• Sponsoring Organization: OE USDOE - Office of Electric Transmission and Distribution
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1003145
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 12 Vol. 88; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
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