Bentner, J. and Babic, D. and Suergers, C. and Strunk, Christoph (2004) Effect of submicron holes on the vortex dynamics of a superconducting microbridge. PHYSICAL REVIEW B, 70 (18): 184516. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
We measured and compared the electric field vs current density characteristics in the vortex state of two amorphous Nb0.7Ge0.3 microbridges, with and without a line of submicron holes patterned along the sample axis. The power dissipation in the perforated sample exhibits a crossover, being reduced at temperatures well below the superconducting transition temperature T-c and unexpectedly enhanced close to T-c. At low temperatures the holes are efficient artificial pinning centers and reduce the average vortex velocity. We argue that the dissipation enhancement close to T-c is a consequence of a combination of the weakened pinning by the holes and an inhomogeneous driving-current distribution in their vicinity, which results in an increased average vortex velocity as well as in a channeling of the vortex motion through the holes.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NB FILMS; FLUX; VORTICES; LATTICES; ARRAYS; SIZE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Christoph Strunk |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 23 Jun 2021 08:38 |
| Last Modified: | 23 Jun 2021 08:38 |
| URI: | https://pred.uni-regensburg.de/id/eprint/37017 |
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