Vortex correlations in the superconducting transition of YBa[sub 2](Cu[sub 1[minus][ital x]]Al[sub [ital x]])[sub 3]O[sub 7[minus][delta]] films in high magnetic fields
- Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States)
We determine the characteristic length scale for vortex correlations in YBa[sub 2](Cu[sub 1[minus][ital x]]Al[sub [ital x]])[sub 3]O[sub 7[minus][delta]] films [0[le][ital x][le]0.03] by studying their current-voltage characteristics in fields 0.5 T[le][ital B][le]6 T. We find that critical scaling persists over 60% of the resistive transition (which widens from 3 to 30 K as doping concentration and field increase) and breaks down when the correlation length is 500--1250 A, a value that [ital does] [ital not] depend on the intervortex spacing. This result suggests that pinning in as-made films of YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] is dominated by extended rather than microscopic defects.
- DOE Contract Number:
- FG02-90ER45427
- OSTI ID:
- 6238554
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:10; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
FILMS
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
OXIDES
OXYGEN COMPOUNDS
SUPERCONDUCTING FILMS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TRANSITION ELEMENT COMPOUNDS
VORTICES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES