Niobium stripline resonators for microwave studies on superconductors

27th International Conference on Low Temperature Physics

Thiemann, Markus^1 ; Bothner, Daniel^2 ; Koelle, Dieter^2 ; Kleiner, Reinhold^2 ; Dressel, Martin^1 ; Scheffier, Marc^1

L.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, Stuttgart

D-70550, Germany^1

Physikalisches Institut, Center for Collective Quantum Phenomena in LISA, Universität Tübingen, Auf der Morgenstelle 14, Tübingen

D-72076, Germany^2

关键词: Complex conductivity;    Intrinsic property;    Measurement techniques;    Stripline resonators;    Superconducting bulks;    Superconducting stripline;    Superconducting transitions;    Temperature dependence;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/568/2/022043/pdf
DOI  :  10.1088/1742-6596/568/2/022043

来源: IOP

【 摘 要 】

Microwave spectroscopy is a powerful experimental tool to reveal information on The intrinsic properties of superconductors. Superconducting stripline resonators, where The material under study constitutes one of The ground planes, offer a high sensitivity to investigate superconducting bulk samples. In order to improve this measurement technique, we have studied stripline resonators made of niobium, and we compare The results to lead stripline resonators. With this technique we are able to determine The temperature dependence of The complex conductivity of niobium and The energy gap Δ(0) 2.1 meV. Finally we show measurements at The superconducting transition of a tantalum bulk sample using niobium stripline resonators.