Superconducting shells in ceramic YBa/sub 2/Cu/sub 3/O/sub 7/

Journal Article · Wed Jul 01 00:00:00 EDT 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.36.829· OSTI ID:6511883

Ginley, D S; Venturini, E L; Kwak, J F; Baughman, R J; Morosin, B; Schirber, J E

We demonstrate that, even in single-phase ceramic YBa/sub 2/Cu/sub 3/O/sub 7/, superconductivity occurs in only thin shells surrounding normal grains. The shells comprise no more than 25 vol% of the material, independent of preparation technique and subsequent processing. This conclusion is based on comparison of magnetic flux exclusion, Meissner and resistivity data for bulk, compacted, and ground materials. We show that these data depend on the sample microstructure, but do not arise from pinning effects.

• Research Organization: Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6511883
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 36:1; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CERAMICS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
GRANULAR MATERIALS
MAGNETIC FLUX
MATERIALS
MEISSNER-OCHSENFELD EFFECT
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES