Vortex correlation lengths and bundle sizes from voltage noise in YBa{sub 2}Cu{sub 3}O{sub 7}

Journal Article · Sat Feb 28 23:00:00 EST 1998 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.57.5524· OSTI ID:580393

Gray, K E ^[1]

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1. Materials Sciences Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

Voltage noise is one way to estimate flux-bundle sizes in superconductors undergoing flux creep. Modeling such data from epitaxial films of YBa{sub 2}Cu{sub 3}O{sub 7}, we show that at high temperatures, the bundle size grows with the c-axis correlation length of pancake vortices (residing in the Cu-O planes), while at low temperatures, flux creep is consistent with vortex-line bundles which are larger than a minimum size. The separation of these regimes is roughly at the vortex-lattice melting line, implying that a large c-axis correlation length is needed for vortex-lattice freezing. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 580393
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 9 Vol. 57; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
COPPER OXIDES
CREEP
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
NOISE
SUPERCONDUCTING FILMS
VOLTAGE DROP
YTTRIUM OXIDES