Superconducting critical properties and AC losses in a large sample of in situ formed Cu-Nb/sub 3/Sn composite

Journal Article · Tue Jan 01 00:00:00 EST 1980 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.91284· OSTI ID:5890494

Bevk, J; Harbison, J P; Habbal, F; Wagner, G R; Braginski, A I

Critical-current density, upper critical field, and hysteresis ac losses have been evaluated for a large (100-m long) sample of in situ formed Cu-Nb/sub 3/Sn composite with superconducting volume fraction lambdaapprox. =0.23. The magnetic field dependence of the critical current, measured in wire and tape samples of different reductions, cannot be explained by a model based on a single pinning mechanism. The enhancement of the pinning force in highly reduced tape composites is attributed to surface flux pinning at the filament-matrix interfaces. Hysteretic ac losses obtained by calorimetric and electronic measuring methods confirmed the results reported previously for small in situ samples.

• Research Organization: Division of Applied Sciences, Harvard University, Cambridge, Massachusetts 02138
• OSTI ID: 5890494
• Journal Information: Appl. Phys. Lett.; (United States), Vol. 36:1
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
SUPERCONDUCTING COMPOSITES
CRITICAL CURRENT
CRITICAL FIELD
ENERGY LOSSES
CALORIMETRY
COMPARATIVE EVALUATIONS
COPPER ALLOYS
DATA
HYSTERESIS
INTERFACES
MAGNETIC FIELDS
MAGNETIC FLUX
MATHEMATICAL MODELS
NIOBIUM ALLOYS
QUANTITY RATIO
TIN ALLOYS
WIRES
ALLOYS
COMPOSITE MATERIALS
CURRENTS
ELECTRIC CURRENTS
INFORMATION
LOSSES
420201* - Engineering- Cryogenic Equipment & Devices