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Influence of thickness, width and temperature on critical current density of Nb thin film structures

Ilin, Konstantin and Rall, Dagmar and Siegel, Michael and Angel, Andreas and Schilling, Andreas and Semenov, Alexej and Hübers, H.-W. (2010) Influence of thickness, width and temperature on critical current density of Nb thin film structures. Physica C: Superconductivity and its Applications, 470. DOI: 10.1016/j.physc.2010.02.042. ISSN 0921-4534.

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Abstract

The density of critical currents jC in Nb thin films with thickness smaller than 15 nm and width between 100 nm and 10 lm has been measured in a wide temperature range. We have found that the temperature dependencies of jC in sub-micrometer wide bridges at 0.7TC < T < TC are well described by the Ginzburg– Landau de-pairing critical current. In wider bridges already at T < 0.9TC the jC value is significantly reduced due to the penetration and de-pinning of magnetic vortices.

Document Type:Article
Title:Influence of thickness, width and temperature on critical current density of Nb thin film structures
Authors:
AuthorsInstitution or Email of Authors
Ilin, KonstantinUniversity of Karlsruhe
Rall, DagmarKIT
Siegel, MichaelUniversität Karlsruhe
Angel, AndreasUni Zürich
Schilling, AndreasUni Zürich
Semenov, Alexejalexei.semenov@dlr.de
Hübers, H.-W.heinz-wilhelm.huebers@dlr.de
Date:2010
Journal or Publication Title:Physica C: Superconductivity and its Applications
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:470
DOI:10.1016/j.physc.2010.02.042
ISSN:0921-4534
Status:Published
Keywords:Thin Nb films, De-pairing critical current density, De-pinning of magnetic vortices
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W - no assignement
DLR - Research area:Space
DLR - Program:W - no assignement
DLR - Research theme (Project):W -- no assignement (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Terahertz and Infrared Sensors
Deposited By: Prof.Dr. Alexey Semenov
Deposited On:10 Jan 2011 09:39
Last Modified:26 Mar 2013 13:25

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