Magnetic field sensor with ferromagnetic thin layers having magn

Details Magnetic field sensor with ferromagnetic thin layers having magn Magnetic field sensor with ferromagnetic thin layers having magn

1989-06-14

1990-08-14

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetometers

338 32H, 360113, G01R 3306, G11B 539, H01L 4300

Patent

active

049490397

ABSTRACT:
A magnetic field sensor comprises a stack of ferromagnetic layers advantageously separated by an intermediate layer of proper material and so arranged that the ferromagnetic layers are with one component in an antiparallel magnetization direction. The sensor is provided with terminals for passing an electric current through the stack and for detecting a voltage drop across the stack. The magnetic resistance change with such a stack is substantially greater than in systems which do not provide an antiparallel magnetization or do not have the intermediate layer.

REFERENCES:
patent: 3860965 (1975-01-01), Voegeli
patent: 4356523 (1982-10-01), Yeh
patent: 4686472 (1987-08-01), Van Ooijen et al.
patent: 4755897 (1988-07-01), Howard
patent: 4809109 (1989-02-01), Howard et al.

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