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

Improving the sensitivity of a high-T_c 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

^*Corresponding author for this work

Undergraduate Program of Electro-Optical Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

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, V_φ. A flux focuser is employed to increase the effective area of the SQUID. The serial SQUID array has high-quality device characteristics. High-T_c SQUID magnetometers exhibiting a magnetic field sensitivity of ∼45 fT/Hz^1/2 in the white region and 200 fT/Hz^1/2 at 1 Hz have been demonstrated in this work. The flip-chip SQUID magnetometer shows a sufficiently high sensitivity to record magnetocardiograms.

Original language	English
Pages (from-to)	1109-1113
Number of pages	5
Journal	Journal of the Korean Physical Society
Volume	48
Issue number	5 I
Publication status	Published - 2006 May

Keywords

Flip-chip
Flux focuser
Serial SQUID

ASJC Scopus subject areas

General Physics and Astronomy

Cite this

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title = "Improving the sensitivity of a high-Tc SQUID magnetometer with a serial array",

abstract = "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.",

keywords = "Flip-chip, Flux focuser, Serial SQUID",

author = "Wu, {Chiu Hsien} and Chen, {K. L.} and Chen, {J. C.} and Chen, {M. J.} and Chen, {C. Y.} and Chiang, {C. T.} and Yang, {Hong Chang} and Horng, {Herng Er} and Jeng, {J. T.}",

year = "2006",

month = may,

language = "English",

volume = "48",

pages = "1109--1113",

journal = "Journal of the Korean Physical Society",

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publisher = "Korean Physical Society",

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TY - JOUR

T1 - Improving the sensitivity of a high-Tc SQUID magnetometer with a serial array

AU - Wu, Chiu Hsien

AU - Chen, K. L.

AU - Chen, J. C.

AU - Chen, M. J.

AU - Chen, C. Y.

AU - Chiang, C. T.

AU - Yang, Hong Chang

AU - Horng, Herng Er

AU - Jeng, J. T.

PY - 2006/5

Y1 - 2006/5

N2 - 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.

AB - 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.

KW - Flip-chip

KW - Flux focuser

KW - Serial SQUID

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M3 - Article

AN - SCOPUS:33744970044

SN - 0374-4884

VL - 48

SP - 1109

EP - 1113

JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

IS - 5 I

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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