Characteristics of integrated high- Tc superconducting quantum interference device magnetometer and gradiometer with serial array

Hong Chang Yang, C. H. Wu, J. C. Chen, K. L. Chen, Herng Er Horng, Yi Shou Tsai, S. Y. Yang

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Abstract

We characterized the current-voltage, voltage-flux, and the field sensitivity of integrated high- Tc series superconducting quantum interference device (SQUID) magnetometers and gradiometers. The series two-SQUID magnetometers shows field sensitivities of ∼30-40 fT Hz12 at 1 kHz and ∼80-100 fT Hz12 at 1 Hz over that of a one-SQUID magnetometer in shielded environment. The field sensitivity of a series two-SQUID gradiometers is ∼60 fT Hz12 cm, while the one-SQUID gradiometer shows a gradient sensitivity of ∼80-150 fT Hz12 cm at 1 kHz in an unshielded laboratory environment. The series two-SQUID magnetometers or gradiometers show a significant improvement in flux noises over that of one-SQUID magnetometers or gradiometers.

Original languageEnglish
Article number024508
JournalJournal of Applied Physics
Volume102
Issue number2
DOIs
Publication statusPublished - 2007 Aug 7

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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