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Microwave measurements of the high magnetic field vortex motion pinning parameters in Nb3Sn

Authors :
Andrea Alimenti
Kostiantyn Torokhtii
Luigi Muzzi
Nicola Pompeo
René Flükiger
T. Spina
Enrico Silva
Alimenti, Andrea
Pompeo, Nicola
Torokhtii, Kostiantyn
Spina, Tiziana
Flükiger, René
Muzzi, Luigi
Silva, Enrico
Source :
Superconductor Science and Technology. 34:014003
Publication Year :
2020
Publisher :
IOP Publishing, 2020.

Abstract

The high frequency vortex motion in Nb$_3$Sn was analyzed in this work up to 12 T. We used a dielectric loaded resonator tuned at 15 GHz to evaluate the surface impedance $Z$ of a Nb$_3$Sn bulk sample (24.8 at.\%Sn). From the field induced variation of $Z$, the high frequency vortex parameters (the pinning constant $k_p$, the depinning frequency $\nu_p$ and the flux flow resistivity $\rho_{ff}$) were obtained over a large temperature and field range; their field and temperature dependence were analyzed. Comparison with other superconducting materials shows that high frequency applications in strong magnetic fields are also feasible with Nb$_3$Sn. In the present work, we report the first measurements about the microwave response in Nb$_3$Sn in strong magnetic fields.<br />Comment: 24 pages, 12 figures

Details

ISSN :
13616668 and 09532048
Volume :
34
Database :
OpenAIRE
Journal :
Superconductor Science and Technology
Accession number :
edsair.doi.dedup.....1c980400baecaddbea3c8048d1f08253
Full Text :
https://doi.org/10.1088/1361-6668/abc05d