1. Microwave measurements of the high magnetic field vortex motion pinning parameters in Nb3Sn
- Author
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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, and Silva, Enrico
- Subjects
Materials science ,Condensed matter physics ,Condensed Matter - Superconductivity ,Metals and Alloys ,Nb3Sn, surface impedance, microwave, high magnetic fields, vortex pinning parameters ,FOS: Physical sciences ,Motion (geometry) ,Condensed Matter Physics ,Vortex ,Superconductivity (cond-mat.supr-con) ,Condensed Matter::Superconductivity ,Materials Chemistry ,Ceramics and Composites ,Surface impedance ,Electrical and Electronic Engineering ,High magnetic field ,Microwave - 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., Comment: 24 pages, 12 figures
- Published
- 2020
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