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Adjustment of self-heating in long superconducting thin film NbN microbridges

Stockhausen, Axel and Ilin, Konstantin and Siegel, Michael and Södervall, U. and Jedrasik, P. and Semenov, A. and Hübers, H.-W. (2012) Adjustment of self-heating in long superconducting thin film NbN microbridges. Superconducting Science and Technology, 25 (035012), pp. 1-8. IOP Publisching.

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Abstract

The self-heating in long superconducting microbridges made from thin NbN films deposited on top of high silicon mesa structures was studied by analyzing the hysteresis current density jH. We observed a more than twofold decrease of jH with increase in the ratio of the height of the Si mesa, h, to the width of the microbridge, W, from 0 to 24. We describe our experimental results using one-dimensional thermal balance equations taking into account disordered matter in our thin NbN films and limitations imposed on the phonon mean free path by the width of the Si mesa. In the framework of this model we obtain a good agreement between theory and experiment over a wide temperature range from 4.2 K up to the critical temperature TC for all h=W ratios.

Item URL in elib:https://elib.dlr.de/78808/
Document Type:Article
Title:Adjustment of self-heating in long superconducting thin film NbN microbridges
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Stockhausen, AxelUniversität KarlsruheUNSPECIFIED
Ilin, KonstantinUniversity of KarlsruheUNSPECIFIED
Siegel, MichaelUniversität KarlsruheUNSPECIFIED
Södervall, U.Nanofabrication Laboratory, MC2, Chalmers University of Technology, SE 412 96 Gothenburg,UNSPECIFIED
Jedrasik, P.Nanofabrication Laboratory, MC2, Chalmers University of Technology, SE 412 96 Gothenburg,UNSPECIFIED
Semenov, A.alexei.semenov (at) dlr.deUNSPECIFIED
Hübers, H.-W.heinz-wilhelm.huebers (at) dlr.deUNSPECIFIED
Date:30 January 2012
Journal or Publication Title:Superconducting Science and Technology
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:No
In ISI Web of Science:Yes
Volume:25
Page Range:pp. 1-8
Publisher:IOP Publisching
Status:Published
Keywords:NbN thin film microbridges, self heating
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben IR-Sensorik, IR-Missionsprojekte
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Experimentelle Planetenphysik
Deposited By: Semenov, Prof.Dr. Alexey
Deposited On:11 Dec 2012 14:23
Last Modified:11 Dec 2012 14:23

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