Influence of oxygen deficiency on the superconductive properties of grain-aligned YBa sub 2 Cu sub 3 O sub 7 minus. delta

Journal Article · Mon Jun 01 04:00:00 EDT 1992 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.45.12534· OSTI ID:7110714

Ossandon, J G ^[1]; Thompson, J R ^[2]; Christen, D K; Sales, B C; Kerchner, H R ^[3]; Thomson, J O; Sun, Y R ^[1]; Lay, K W; Tkaczyk, J E ^[4]

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1. Department of Physics, University of Tennessee, Knoxville, Tennessee 37996-1200 (United States)
2. Oak Ridge National Laboratory, Solid State Division, P.O. Box 2008, Oak Ridge, Tennessee 37831-6061 (United States) Department of Physics, University of Tennessee, Knoxville, Tennessee 37996-1200 (United States)
3. Oak Ridge National Laboratory, Solid State Division, P.O. Box 2008, Oak Ridge, Tennessee 37831-6061 (United States)
4. General Electric Corporate R D, Schenectady, New York 12301 (United States)

Magnetically aligned samples of sintered YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} were used to test the effects of oxygen-deficiency {delta} (with {delta}{le}0.2) on the superconductive magnetization {ital M}, critical current density {ital J}{sub {ital c}}, irreversibility field {ital B}{sub irr}, upper critical field {ital H}{sub {ital c}2}, coherence length {xi}, condensation energy {ital F}{sub {ital c}}, penetration depth {lambda}, and related properties as a function of temperature {ital T} and applied field {bold H}{parallel}{bold c}. In selected cases, studies were also made with {bold H}{parallel}{ital ab}. The O content was monitored {ital in} {ital situ} by thermogravimetric analysis. The open porosity and granularity of the material allowed rapid and homogeneous oxygenation. We found no significant enhancement of intragrain {ital J}{sub {ital c}} with chain-site O defects. With few exceptions, maximum {ital J}{sub {ital c}} occurred at full oxygenation.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7110714
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 45:21; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENCE LENGTH
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL STRUCTURE
CURRENTS
DIMENSIONS
ELECTRIC CURRENTS
ELEMENTS
GRAIN ORIENTATION
HIGH-TC SUPERCONDUCTORS
LENGTH
MAGNETIZATION
MICROSTRUCTURE
NONMETALS
ORIENTATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PENETRATION DEPTH
STOICHIOMETRY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES