Characteristics of integrated high-T-c superconducting quantum interference device magnetometer and gradiometer with serial array
Resource
JOURNAL OF APPLIED PHYSICS,102(2),024508-024508.
Journal
Journal of Applied Physics
Pages
24508
Date Issued
2007-02
Date
2007-02
Author(s)
Yang, Hong-Chang
Wu, C. H.
Chen, J. C.
Chen, K. L.
Horng, Herng-Er
Tsai, Yi-Shou
Yang, S. Y.
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 ∼30–40fT∕Hz1∕2 at 1kHz and ∼80–100fT∕Hz1∕2 at 1Hz over that of a one-SQUID magnetometer in shielded environment. The field sensitivity of a series two-SQUID gradiometers is ∼60fT∕Hz1∕2cm, while the one-SQUID gradiometer shows a gradient sensitivity of ∼80–150fT∕Hz1∕2cm at 1kHz 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.
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