Title :
Extended measurements of the resistive critical current transition
Author :
Narang, G. ; Warnes, W.H.
Author_Institution :
Dept. of Mech. Eng., Oregon State Univ., Corvallis, OR, USA
fDate :
3/1/1993 12:00:00 AM
Abstract :
The resistive critical current transition has been measured in a variety of Nb-Ti wires over several decades in voltage. The measurements were made as a function of magnetic field for wires with a variety of processing conditions, leading to both intrinsic and extrinsic limitations to the critical current (I/sub c/). Measurements of the wire geometry by image analysis have been used to assess the extent of extrinsic limitation of I/sub c/ and to see if any correlation exists between the V(I) transition and the filament geometry. A weak correlation between the linear variation in the cross-sectional area of the filaments and the I/sub c/ distribution of the samples was observed.<>
Keywords :
critical currents; niobium; superconducting transition temperature; titanium; type II superconductors; Nb-Ti wires; filament geometry; image analysis; resistive critical current transition; weak correlation; wire geometry; Conductivity; Critical current; Current measurement; Geometry; Magnetic field measurement; Shape; Superconducting filaments and wires; Superconducting integrated circuits; Superconducting materials; Voltage measurement;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
