Axial high-temperature superconducting-quantum-interference-device gradiometer composed of magnetometers with a monolithic feedback and compensation coil

Koichi Yokosawa, Hiroshi Oyama, Shinya Kuriki, Daisuke Suzuki, Keiji Tsukada

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A first-order axial gradiometer has been constructed using two high-critical-temperature superconducting-quantum-interference-device magnetometers having a double-pickup loop configuration on bicrystal substrates. The magnetometer, which had a slot-type structure but no weak links on the pickup loops, can be operated steadily in an unshielded environment after in situ cooling. The gradiometer was formed by connecting the feedback and the compensation coils of the two magnetometers in series using a normal conductive wire. Sufficiently high noise reduction (31 dB at 1 Hz) was achieved without any need for adjustments and low-noise magnetocardiograms were obtained with the gradiometer in a moderately magnetically shielded room.

Original languageEnglish
Pages (from-to)2745-2747
Number of pages3
JournalApplied Physics Letters
Volume78
Issue number18
DOIs
Publication statusPublished - Apr 30 2001
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Axial high-temperature superconducting-quantum-interference-device gradiometer composed of magnetometers with a monolithic feedback and compensation coil'. Together they form a unique fingerprint.

  • Cite this