A Compact Very Low Noise DC-SQUID Magnetometer

  • R. Cantor
  • T. Ryhänen
  • H. Seppä
Part of the Springer Proceedings in Physics book series (SPPHY, volume 64)

Abstract

We have designed and fabricated a very low noise integrated dc Superconducting QUantum Interference Device (SQUID) magnetometer on a 4×4 mm2 chip. The white flux noise at 1 kHz is \(6 \times {10^{ - 7}}{\Phi _0}/\sqrt {Hz} \). This corresponds to a flux density noise of \(3.4\;fT/\sqrt {Hz} \) and a coupled energy resolution of 32 h. The 1/f noise corner frequency is 10 Hz and the 1/f flux noise at 1 Hz is \(2 \times {10^{ - 6}}{\Phi _0}/\sqrt {Hz} \).

Keywords

Microwave Lution Reso 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • R. Cantor
    • 1
  • T. Ryhänen
    • 2
  • H. Seppä
    • 2
  1. 1.Institut BerlinPhysikalisch-Technische BundesanstaltBerlin 10Fed. Rep. of Germany
  2. 2.Metrology Research InstituteHelsinki University of Technology and Technical Research Centre of FinlandEspooFinland

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