rf-SQUID magnetometer biased by harmonic

Journal Article · Sun Jul 01 04:00:00 EDT 1979 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.326556· OSTI ID:6000559

Yamashita, T; Onodera, Y

This paper describes a refined rf-SQUID magnetometer in which not only the fabrication of the SQUID sensor becomes easier but also the magnetic flux could be stably measured with sufficient sensitivity at a wider range of temperatures compared with existing SQUID systems. Two frequency components are used in the proposed rf-SQUID magnetometer, one of which is to excite the SQUID sensor and the other is to detect its response. Furthermore, from both the phenomenological analysis and the experimental results it is shown that the present rf-SQUID magnetometer performs its function well even if the value of LI/sub c/ of the SQUID sensor is much larger than the flux quantum phi/sub 0/.

• Research Organization: Research Institute of Electrical Communication, Tohoku University, Sendai, Japan
• OSTI ID: 6000559
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 50:7; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DATA
ELECTRONIC EQUIPMENT
FABRICATION
FLUXMETERS
HARMONICS
INFORMATION
MAGNETIC FLUX
MAGNETOMETERS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
OSCILLATIONS
SENSITIVITY
SQUID DEVICES
SUPERCONDUCTING DEVICES
TEMPERATURE DEPENDENCE