Observed regimes of collective flux creep in proton-irradiated, single-crystal Y-Ba-Cu-O: Dependence on current density

Journal Article · Sun May 01 00:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.49.13287· OSTI ID:5089542

Thompson, J R ^[1]; Sun, Y R ^[2]; Christen, D K ^[3]; Civale, L; Marwick, A D; Holtzberg, F ^[4]

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1. Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6061 (United States) Department of Physics, University of Tennessee, Knoxville, Tennessee 37996-1200 (United States)
2. Department of Physics, University of Tennessee, Knoxville, Tennessee, 37996-1200 (United States)
3. Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6061 (United States)
4. IBM Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598-0218 (United States)

Flux-creep studies have quantified the time decay of supercurrents in a proton-irradiated YBa[sub 2]Cu[sub 3]O[sub 7] crystal. We determine the dependence of the characteristic exponent [mu] (which governs current decay) on current density and magnetic field. The results are compared with collective-creep theory for the case of random pointlike disorder. Observed are predicted regimes of creep with small and large bundles of vortices, indications of single vortex motion, crossovers in current density, and other qualitative consistencies.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5089542
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 49:18; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360607* -- Other Materials-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BARYONS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CREEP
CRYSTALS
CURRENT DENSITY
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FLUX QUANTIZATION
HADRONS
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
MECHANICAL PROPERTIES
MEV RANGE
MEV RANGE 01-10
MONOCRYSTALS
NUCLEONS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL RADIATION EFFECTS
PROTONS
RADIATION EFFECTS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES