Vibrating-reed experiments on superconducting suspensions

Journal Article · Mon May 13 04:00:00 EDT 1991 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.66.2507· OSTI ID:5694422

Kober, J; Gupta, A; Esquinazi, P; Braun, H F ^[1]; Brandt, E H ^[2]

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1. Physikalisches Institut, Universitaet Bayreuth, D-8580 Bayreuth, Federal Republic of Germany (DE)
2. AT T Bell Laboratories, Murray Hill, New Jersey 07974 (US)

The frequency of a vibrating reed made of a superconducting suspension of isolated micrometer-size grains of low- and high-{ital T}{sub {ital c}} superconductors in a magnetic field {ital directly} measures the elastic pinning force on the flux line. Four different types of field and temperature dependences of the attenuation caused by moving flux lines are observed and explained. In particular, the shift to lower temperatures of the dissipation peak of small high-{ital T}{sub {ital c}} grains perfectly agrees with the prediction by thermally activated depinning.

• OSTI ID: 5694422
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 66:19; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
ATTENUATION
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
DATA
DISPERSIONS
ELASTICITY
EXPERIMENTAL DATA
GRAIN SIZE
HIGH-TC SUPERCONDUCTORS
INFORMATION
LOW TEMPERATURE
MAGNETIC FIELDS
MAGNETIC FLUX
MECHANICAL PROPERTIES
MICROSTRUCTURE
MIXED STATE
NIOBIUM ALLOYS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POWDERS
RESONANCE
SIZE
SUPERCONDUCTORS
SUSPENSIONS
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TITANIUM ALLOYS
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE