Abstract
It is shown experimentally, that the current-voltage characteristics of a twisted NbTi multifilamentary superconductor placed in a perpendicular magnetic field differ from those of untwisted superconductors. It was explained by the current transfer across the normal metal matrix due to the inhomogeneous electric field distribution along each filament. Electric field inhomogeneities along each filament arise as a result of varying the angle between the external magnetic field and filament axis. Several model conductors were prepared to investigate the role of the normal metal matrix resistivity and the geometrical arrangement of filaments. A two-dimensional theoretical model explaining the measured characteristics is also presented.
Original language | English |
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Pages (from-to) | 963-970 |
Number of pages | 8 |
Journal | Cryogenics |
Volume | 29 |
Issue number | 10 |
DOIs | |
State | Published - Oct 1989 |
Externally published | Yes |
Keywords
- NbTi
- current-voltage characteristics
- filament spirality
- superconductors