Lorentz-force independence of resistance tails for high-temperature superconductors in magnetic fields near T sub c

Journal Article · Mon Oct 23 04:00:00 EDT 1989 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.63.1877· OSTI ID:5300744

Woo, K C; Gray, K E; Kampwirth, R T; Kang, J H; Stein, S J; East, R; McKay, D M ^[1]

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1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois, 60439 (US)

An unusual loss mechanism has been commonly observed in the high-temperature superconductors in a magnetic field near the zero-field transition temperature {ital T}{sub {ital c}}. The resistive transitions associated with this loss in highly {ital c}-axis-oriented Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub {ital x}} thin films are presented as a function of field perpendicular to the {ital c} axis, for the current {ital both} {ital perpendicular} {ital and} {ital parallel} {ital to} {ital the} {ital field}. The data for these orientations are essentially the same over a span of 5 orders of magnitude below the normal-state resistance. Since the {ital macroscopic} Lorentz force is zero for the current parallel to the magnetic field, it can play, at most, a significantly reduced role in this loss mechanism, and our results seriously question any explanation of these losses based on magnetic flux motion.

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5300744
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 63:17; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
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BARIUM COMPOUNDS
BARIUM OXIDES
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CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
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CRYSTALS
ELECTRIC CONDUCTIVITY
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ENERGY LOSSES
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LOSSES
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MAGNETIC FLUX
MONOCRYSTALS
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THALLIUM COMPOUNDS
THALLIUM OXIDES
THERMODYNAMIC PROPERTIES
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VERY LOW TEMPERATURE