Improving the sensitivity of a high-Tc SQUID magnetometer with a serial array

Chiu Hsien Wu, K. L. Chen, J. C. Chen, M. J. Chen, C. Y. Chen, C. T. Chiang, Hong Chang Yang, Herng Er Horng, J. T. Jeng

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    5 引文 斯高帕斯(Scopus)


    To pursue a high-reproducibility and high-quality SQUID for high-T c superconducting applications, we have designed and fabricated a flip-chip magnetometer as a sensor for measuring weak magnetic signals. The magnetometer consists of a serial SQUID magnetometer coupled to a flux focuser. The SQUIDs are connected in series, thereby increasing the peak-to-peak value of the voltage-flux transfer function, Vφ. A flux focuser is employed to increase the effective area of the SQUID. The serial SQUID array has high-quality device characteristics. High-Tc SQUID magnetometers exhibiting a magnetic field sensitivity of ∼45 fT/Hz1/2 in the white region and 200 fT/Hz1/2 at 1 Hz have been demonstrated in this work. The flip-chip SQUID magnetometer shows a sufficiently high sensitivity to record magnetocardiograms.

    頁(從 - 到)1109-1113
    期刊Journal of the Korean Physical Society
    發行號5 I
    出版狀態已發佈 - 2006 五月 1

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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