Apparatus for sensing a magnetic field with a superconductive ma

Details Apparatus for sensing a magnetic field with a superconductive ma Apparatus for sensing a magnetic field with a superconductive ma

1993-03-19

1994-10-04

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetometers

324262, 324252, 307306, 505845, 505701, G01R 33035, G01R 3306, H01L 3912, H01L 3916

Patent

active

053529782

ABSTRACT:
An apparatus of sensing a magnetic field using a ceramic superconductor magneto-resistive element having a superconductor magneto resistive effect of non linear characteristic against the applied magnetic field, there is provided a coil for applying a bias magnetic field to the magneto-resistive element, the coil is connected to a feed back power source for supplying current for holding the output of the magneto-resistive element constant value, whereby the applied magnetic field is measured by the current supplied to the coil.
There is disclosed also a device for sensing a magnetic field using a magneto-resistive element comprising a superconductor member having weak coupling grain boundaries, said device comprising means for applying A.C. bias magnetic field to said element, and means for taking out an output voltage of the element generated by application of the bias magnetic field as the signal representing the intensity of the applied magnetic field.

REFERENCES:
patent: 5011818 (1991-09-01), Katoka et al.
Japanese Journal of Applied Physics, vol. 27, No. 5, 1988 pp. 746-750, Tokyo, JP: H. Nojima, et al. titled "Galvanomagnetic Effect of an Y-Ba-Cu-O Ceramic Superconductor and its Application to Magnetic Sensors".
IBM Technical Disclosure Bulletin, vol. 32, No. 5A, 1989, pp. 236-237.
Japanese Journal of Applied Physics, vol. 26, No. 7, Jul., 1987, pp. 1050-1055.
R&D Association for Future Electron Devices, Jun. 7-9, 1989 in Shikabe, Hokkaido, Japan, pp. 375-378.
FED HiTcSc-ED Workshop, Jun. 2-4, 1988, Miyagi-Zao, pp. 231-234.
Novel Magnetic Sensor Using Y-Ba-Cu-O Ceramic Superconductor Super Magneto-Resistor IEDM 87-867-868.

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