Vortex dynamics below the flux-lattice melting transition in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}

Journal Article · Fri Sep 01 04:00:00 EDT 1995 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.52.6211· OSTI ID:115821

Safar, H; Gammel, P L; Huse, D A; Alers, G B; Bishop, D J ^[1]; Lee, W C; Giapintzakis, J; Ginsberg, D M ^[2]

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1. AT&T Bell Laboratories, Murray Hill, New Jersey 07974 (United States)
2. Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)

We report measurements of the critical current, differential resistance, and voltage noise below the vortex-lattice melting transition in clean, untwinned YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} crystals. The differential resistance at dc current bias much greater than {ital J}{sub {ital c}} shows a sharp feature at the melting transition accompanied by a rapid drop in the voltage noise, demonstrating that the melting transition is insensitive to the static pinning potential. In the solid phase, the measurements all show a marked change from the low-field, pinned lattice to the high-field vortex-glass contiguous with the tricritical point in this sample.

• OSTI ID: 115821
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 9 Vol. 52; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BARIUM OXIDES
COPPER OXIDES
CRITICAL CURRENT
ELECTRIC CONDUCTIVITY
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
MELTING
PHASE TRANSFORMATIONS
YTTRIUM OXIDES