Mechanism of the Lorentz-force-independent dissipation in Bi sub 2 Sr sub 2 CaCu sub 2 O sub y

Journal Article · Mon Nov 04 04:00:00 EST 1991 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.67.2737· OSTI ID:5160928

Ando, Y; Motohira, N; Kitazawa, K; Takeya, J; Akita, S ^[1]

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1. Superconductivity Research Laboratory, International Superconductivity Technology Center, 1-10-13 Shinonome, Kotu-ku, Tokyo 135 (Japan) Department of Industrial Chemistry, University of Tyokyo, Hongo, Bunkyo-ky, Tokyo 113 (Japan) Central Research Institute of Electric Power Industry, 2-11-1 Iwato-kita, Komae, Tokyo 201 (Japan)

A novel power law was found above 65 K in the {ital I}-{ital V} characterististics of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub {ital y}} single crystals with the magnetic field perpendicular to the {ital c} axis. At 80 K, the power-law exponent decreased sharply up to 1.5 T but remained nearly constant above it, suggesting an abrupt crossover to a different mechanism. An unusual field dependence of resistivity was also found, which cannot be explained by simple flux-flow theory. The above novel features of the Lorentz-force-independent dissipation can be consistently explained by a model based on two-dimensional vortex-antivortex pair breaking.

• OSTI ID: 5160928
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 67:19; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
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Cermets
& Refractories-- Physical Properties
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BISMUTH COMPOUNDS
BISMUTH OXIDES
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CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTALS
CUPRATES
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HIGH-TC SUPERCONDUCTORS
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MONOCRYSTALS
OXIDES
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VORTICES