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arXiv · 2008.11656

Microwave measurements of the high magnetic field vortex motion pinning parameters in Nb$_3$Sn

Andrea Alimenti·Nicola Pompeo·Kostiantyn Torokhtii·Tiziana Spina·René Flükiger·Luigi Muzzi·Enrico Silva
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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.

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Andrea Alimenti, Nicola Pompeo, Kostiantyn Torokhtii, Tiziana Spina, René Flükiger, Luigi Muzzi, Enrico Silva. 2020-08-26. Microwave measurements of the high magnetic field vortex motion pinning parameters in Nb$_3$Sn. https://doi.org/10.1088/1361-6668/abc05d

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