Orientation dependence of grain-boundary critical currents in YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ bicrystals

Journal Article · Mon Jul 11 04:00:00 EDT 1988 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.61.219· OSTI ID:7161115

Dimos, D; Chaudhari, P; Mannhart, J; LeGoues, F K

The critical current densities across grain boundaries have been measured as a function of misorientation angle in the basal plane with use of bicrystals of YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/. For small misorientation angles, the ratio of the grain-boundary critical current density to the bulk critical current density is roughly porportional to the inverse of the misorientation angle; for large angles, this ratio saturates to a value of about (1/50. These results imply that achieving a high degree of texture both normal to and within the basal plane is important for obtaining very high critical currents in pure polycrystalline samples.

• Research Organization: IBM Research Division, Thomas J. Watson Research Center, Yorktown Heights, New York 10598
• OSTI ID: 7161115
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 61:2; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BICRYSTALS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL STRUCTURE
CRYSTALS
CURRENTS
ELECTRIC CURRENTS
GRAIN BOUNDARIES
MICROSTRUCTURE
ORIENTATION
OXIDES
OXYGEN COMPOUNDS
POLYCRYSTALS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS