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arXiv 1901.08786cond-mat.supr-con
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用于高灵敏度微波磁力测量的高温超导探测器

High-Tc superconducting detector for highly-sensitive microwave magnetometry

François Couëdo, Eliana Recoba Pawlowski, Julien Kermorvant, Juan Trastoy, Denis Crété, Yves Lemaître, Bruno Marcilhac, Christian Ulysse, Cheryl Feuillet-Palma,… 展开作者

François Couëdo, Eliana Recoba Pawlowski, Julien Kermorvant, Juan Trastoy, Denis Crété, Yves Lemaître, Bruno Marcilhac, Christian Ulysse, Cheryl Feuillet-Palma, Nicolas Bergeal, Jérome Lesueur

摘要:

我们已经制造了阵列的高温$_c$超导量子干涉器件(SQUID)与随机分布的环尺寸作为敏感天线的射频(RF)波。这些被称为超导量子干涉滤波器(SQIF)的亚波长尺寸的设备检测电磁场的磁分量。我们使用一种可扩展的离子辐照技术来图案化电路,并设计制作SQUID所需的约瑟夫森结。在这里,我们报告了一个300 SQUID系列阵列的循环面积范围从$6$到$60\ μm^{2}$,折叠在一个曲折线覆盖$3.5\ mm\times 8\ mm$基板面积,制成的$150$ -nm厚的$\mathrm{YBa}_2\mathrm{Cu}_3\mathrm{O}_7$膜。在温度$T=66\ K$下,在未屏蔽的磁环境中,在低DC偏置电流($I=60\ μA$)和DC磁场($B=3\ μT$)下,该SQIF可以在$1.125\ GHz$的频率下检测几个$pT$的磁场,这对应于几百个$fT/\sqrt{Hz}$的灵敏度,并且在RF功率中显示出超过70年的线性响应。该工作为实现低损耗亚波长GHz磁强计提供了一种很有前途的方法。

英文摘要:

We have fabricated arrays of High-T$_c$ Superconducting Quantum Interference Devices (SQUIDs) with randomly distributed loop sizes as sensitive antennas for Radio-Frequency (RF) waves. These sub-wavelength size devices known as Superconducting Quantum Interference Filters (SQIFs) detect the magnetic component of the electromagnetic field. We use a scalable ion irradiation technique to pattern the circuits and engineer the Josephson junctions needed to make SQUIDs. Here we report on a 300 SQUIDs series array with loops area ranging from $6$ to $60\ μm^{2}$, folded in a meander line covering a $3.5\ mm\times 8\ mm$ substrate area, made out of a $150$-nm-thick $\mathrm{YBa}_2\mathrm{Cu}_3\mathrm{O}_7$ film. Operating at a temperature $T=66\ K$ in a un-shielded magnetic environment, under low DC bias current ($I=60\ μA$) and DC magnetic field ($B=3\ μT$), this SQIF can detect a magnetic field of a few $pT$ at a frequency of $1.125\ GHz$, which corresponds to a sensitivity of a few hundreds of $fT/\sqrt{Hz}$, and shows linear response over 7 decades in RF power. This work is a promising approach for the realization of low dissipative sub-wavelength GHz magnetometers.

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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