Microstructure and composition of electromagnetically-characterized YBa sub 2 Cu sub 3 O sub 7-. delta. grain boundaries
Conference
·
OSTI ID:6113446
- Wisconsin Univ., Madison, WI (United States)
- Argonne National Lab., IL (United States)
- National Inst. of Standards and Technology (IMSE), Gaithersburg, MD (United States). Ceramics Div.
The electrical character (flux-pinning, Josephson junction, or resistive) of the grain boundaries in approximately twenty flux-grown YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} bicrystals was determined in previous studies. A selection of these same bicrystals now have been thinned for study by transmission and scanning transmission electron microscopy. High-spatial resolution imaging and analytical techniques reveal microstructural differences among these boundaries that are consistent with their diverse electrical characteristics. The observations offer preliminary insight into some of the feature that control the grain boundary superconducting properties and re-emphasize the very fine scale on which the grain boundary electrical character is determined. 11 refs., 6 figs.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- DOE; NSF; USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6113446
- Report Number(s):
- ANL/CP-74697; CONF-9110181--1; ON: DE92003520; CNN: DMR88-09854
- Country of Publication:
- United States
- Language:
- English
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Conference
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· Physica. C, Superconductivity
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OSTI ID:5329130
Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BICRYSTALS
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL STRUCTURE
CRYSTALS
CURRENT DENSITY
CURRENTS
DIFFRACTION
ELECTRIC CURRENTS
ELECTRON MICROSCOPY
GRAIN BOUNDARIES
HIGH-TC SUPERCONDUCTORS
MICROSCOPY
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
POLYCRYSTALS
SCATTERING
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BICRYSTALS
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL STRUCTURE
CRYSTALS
CURRENT DENSITY
CURRENTS
DIFFRACTION
ELECTRIC CURRENTS
ELECTRON MICROSCOPY
GRAIN BOUNDARIES
HIGH-TC SUPERCONDUCTORS
MICROSCOPY
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
POLYCRYSTALS
SCATTERING
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES