We present a method to measure the absolute surface resistance of conductive samples at a set of GHz frequencies with superconducting lead stripline resonators at temperatures 1–6 K. The stripline structure can easily be applied for bulk samples and allows direct calculation of the surface resistance without the requirement of additional calibration measurements or sample reference points. We further describe a correction method to reduce experimental background on high-Q resonance modes by exploiting TEM-properties of the external cabling. We then show applications of this method to the reference materials gold, tantalum, and tin, which include the anomalous skin effect and conventional superconductivity. Furthermore, we extract the complex optical conductivity for an all-lead stripline resonator to find a coherence peak and the superconducting gap of lead.
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January 2014
Research Article|
January 07 2014
Surface-resistance measurements using superconducting stripline resonators
Daniel Hafner;
Daniel Hafner
1. Physikalisches Institut,
Universität Stuttgart
, D-70550 Stuttgart, Germany
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Martin Dressel;
Martin Dressel
1. Physikalisches Institut,
Universität Stuttgart
, D-70550 Stuttgart, Germany
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Marc Scheffler
Marc Scheffler
a)
1. Physikalisches Institut,
Universität Stuttgart
, D-70550 Stuttgart, Germany
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Rev. Sci. Instrum. 85, 014702 (2014)
Article history
Received:
September 20 2013
Accepted:
December 10 2013
Citation
Daniel Hafner, Martin Dressel, Marc Scheffler; Surface-resistance measurements using superconducting stripline resonators. Rev. Sci. Instrum. 1 January 2014; 85 (1): 014702. https://doi.org/10.1063/1.4856475
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