Magnetic sensor and magnetic field sensing method using said mag

Details Magnetic sensor and magnetic field sensing method using said mag Magnetic sensor and magnetic field sensing method using said mag

1996-01-29

1998-09-22

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetometers

324250, 324260, 360110, G01R 3302, G11B 533

Patent

active

058119710

ABSTRACT:
In a magnetic field sensing method in accordance with the invention of the present application, a magnetic sensor comprising a conductor and at least one magnetic material provided on any of the surfaces of this conductor, is employed. This magnetic sensor is disposed in the vicinity of an external magnetic field which is to be sensed, and by means of supplying a high frequency current to this conductor, the impedance of the conductor changes in accordance with the external magnetic field, and based on this, the external magnetic field is sensed.

REFERENCES:
patent: 3421075 (1969-01-01), Belson
patent: 3703681 (1972-11-01), Johnson et al.
patent: 4635152 (1987-01-01), Iwasaki et al.
patent: 5365391 (1994-11-01), Sugiyama et al.
C. Denis Mee and Eric D. Daniel, Magnetic Recording Technology, vol. 1, pp. 3-6, 1987.
W.B. Weir, "Automatic Measurement of Complex Dielectric Constant and Permeability At Microwave Frequencies," Proceedings of the IEEE, vol. 62, No. 1, Jan. 1974, at 33.
Masakatsu Senda et al., "High frequency measurement technique for patterned soft magnetic film permaebility with magnetic film/conductor/magnetic film inductance line," Review of Scientific Instruments, No. 4 (Apr., 1993), pp. 1034-1037.
H. Iwasaki et al., "Film Thickness and Width Dependence of Output Voltage Response for Read-Out Head Using Induced RF Permeability Change," IEEE Transactions on Magnetics, vol. Mag.-23, No. 5 (Sep. 1987), pp. 2506-2508.

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