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Temperature- and field-dependence of critical currents in NbN microbridges

Engel, Andreas and Bartolf, Holger and Schilling, Andreas and Ilin, Konstantin and Siegel, Michael and Semenov, Alexei and Hübers, Heinz-Wilhelm (2008) Temperature- and field-dependence of critical currents in NbN microbridges. In: Journal of Physics: Conference Series, 97. IOP Publishing. 8th European Conference on Applied Sperconductivity, 2007-09-16 - 2007-09-20, Brussels (Belgium).

Full text not available from this repository.

Official URL: http://www.iop.org/EJ/article/1742-6596/97/1/012152/jpconf8_97_012152.pdf?request-id=ccca31ed-6abc-476b-9c77-3d8bfb435b8a

Abstract

We report measurements of the critical current of nano- and micrometer-sized NbN bridges as a function of temperature and magnetic eld. The bridges were fabricated from 4 to 10 nm thick, sputtered NbN lms using standard photo- and e-beam lithography. The detailed temperature- and eld-dependence is strongly influenced by the bridge width. We interpret our data taking into account geometrical edge barriers for vortex entry and conclude that submicrometer wide bridges remain free of vortices in zero-eld and measured critical currents are the depairing currents. The situation is much more complex inmicrometer-wide bridges. For certain conditions such bridges may even show non-monotonous dependence of the critical current on temperature. We develop a qualitative model that explains our main observations.

Document Type:Conference or Workshop Item (UNSPECIFIED)
Additional Information:doi:10.1088/1742-6596/97/1/012152
Title:Temperature- and field-dependence of critical currents in NbN microbridges
Authors:
AuthorsInstitution or Email of Authors
Engel, AndreasUniversity of Zürich
Bartolf, HolgerUniversity of Zürich
Schilling, AndreasUniversity of Zürich
Ilin, KonstantinUniversity of Karlsruhe
Siegel, MichaelUniversity of Karlsruhe
Semenov, AlexeiUNSPECIFIED
Hübers, Heinz-WilhelmUNSPECIFIED
Date:March 2008
Journal or Publication Title: Journal of Physics: Conference Series
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Volume:97
Number of Pages:6
Publisher:IOP Publishing
Status:Published
Keywords:superconducting nanostructures, magnetic vortices
Event Title:8th European Conference on Applied Sperconductivity
Event Location:Brussels (Belgium)
Event Type:international Conference
Event Dates:2007-09-16 - 2007-09-20
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben IR-Astronomie (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Terahertz and Infrared Sensors
Deposited By: Prof.Dr. Alexey Semenov
Deposited On:05 Jan 2009
Last Modified:17 Mar 2010 11:38

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