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arXiv 2008.11656cond-mat.supr-con
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Nb$_3$Sn 中高磁场涡旋运动钉扎参数的微波测量

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

AI总结:

本研究通过微波谐振器测量 Nb$_3$Sn 在强磁场(至 12 T)下的表面阻抗,提取高频涡旋钉扎参数,证明其适用于强磁场高频应用,并首次报道相关微波响应。

摘要:

本工作分析了 Nb$_3$Sn 中高达 12 T 的高频涡旋运动。我们使用一个调谐至 15 GHz 的介质加载谐振器来评估 Nb$_3$Sn 块体样品(24.8 at.%Sn)的表面阻抗 $Z$。根据 $Z$ 的场致变化,在较宽的温度和磁场范围内获得了高频涡旋参数(钉扎常数 $k_p$、去钉扎频率 $ν_p$ 和磁通流电阻率 $ρ_{ff}$);并分析了它们的场和温度依赖性。与其他超导材料的比较表明,Nb$_3$Sn 也适用于强磁场中的高频应用。在本工作中,我们报告了关于 Nb$_3$Sn 在强磁场中微波响应的首次测量。

英文摘要:

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 $ν_p$ and the flux flow resistivity $ρ_{ff}$) 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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