Weak field measuring magnetometer with flux modulated current co

Details Weak field measuring magnetometer with flux modulated current co Weak field measuring magnetometer with flux modulated current co

1987-12-16

1989-07-25

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetometers

G01R 33035

Patent

active

048517763

ABSTRACT:
A sensitive magnetometer for determining the strength of a very weak magnetic field having at least one Josephson junction through which current induced by the magnetic field and modulated in accordance with a modulation magnetic flux which varies periodically, is conducted. Harmonic separating means separately detects a selected even harmonic component from the current flowing in the Josephson junction to obviate the need for null flux calibration.

REFERENCES:
patent: 4315215 (1982-02-01), Onodera et al.
patent: 4389612 (1983-06-01), Simmonds et al.
patent: 4663590 (1987-05-01), Gershenson et al.
Foglietti et al., Low-Frequency Noise in Low 1/f Noise dc Squid's Appl. Phys. Lett., vol. 49, No. 20, Nov. 17, 1986, pp. 1393-1395.

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