Local magnetic field distribution in polycrystalline YBa sub 2 Cu sub 3 O sub 7 and its influence on bulk critical currents
Journal Article
·
· Journal of Materials Research; (USA)
- Central Research and Development Department, E. I. Du Pont de Nemours and Co., P. O. Box 80357, Wilmington, Delaware 19880-0357 (US)
- Jackson Laboratory, E. I. Du Pont de Nemours and Co., Deepwater, New Jersey 08023 (US)
- Department of Physics, University of Virginia, Charlottesville, Virginia 22901 (US)
The transport critical current density {ital J}{sub {ital c}} has been measured in high quality polycrystalline YBa{sub 2}Cu{sub 3}O{sub 7} samples made from extruded preforms. The hysteretic response of {ital J}{sub {ital c}} to applied magnetic fields was studied as a function of temperature (77--87 K) and sample morphology for various field sweeps in the 0--5 KOe range. A variety of samples show a basic {ital J}{sub {ital c}}{similar to}{ital H}{sup {minus}{ital n}} behavior where {ital n} depends on temperature, but is independent of the other variables. A simple model of the local magnetic field distribution is presented and compared to the data, and the theoretical implications of the power law behavior are considered.
- OSTI ID:
- 5662953
- Journal Information:
- Journal of Materials Research; (USA), Journal Name: Journal of Materials Research; (USA) Vol. 6:6; ISSN JMREE; ISSN 0884-2914
- Country of Publication:
- United States
- Language:
- English
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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
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL STRUCTURE
CRYSTALS
CURRENTS
ELECTRIC CURRENTS
HIGH-TC SUPERCONDUCTORS
LOW TEMPERATURE
MAGNETIC FIELDS
MATHEMATICAL MODELS
MICROSTRUCTURE
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLYCRYSTALS
QUATERNARY COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL STRUCTURE
CRYSTALS
CURRENTS
ELECTRIC CURRENTS
HIGH-TC SUPERCONDUCTORS
LOW TEMPERATURE
MAGNETIC FIELDS
MATHEMATICAL MODELS
MICROSTRUCTURE
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLYCRYSTALS
QUATERNARY COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES