Magnetic field sensor with a plurality of magnetoresistive thin-

Details Magnetic field sensor with a plurality of magnetoresistive thin- Magnetic field sensor with a plurality of magnetoresistive thin-

1997-08-08

1999-10-19

Ballato, Josie

Electricity: measuring and testing

Magnetic

Magnetometers

360113, G01R 3309, G11B 539

Patent

active

059695226

ABSTRACT:
A magnetic field sensing structure for sensing magnetic field changes provided therein having a pair of pole structures with a gap space between them that each include permeable material and end in substantially a common surface. A plurality of field sensing structures is positioned successively in the gap space to be supported between the pole structures with each having an end thereof substantially the common surface. These sensing structures are formed of a plurality of magnetoresistive, anisotropic, ferromagnetic thin-film layers at least two of which are separated from one another by a nonmagnetic, electrically conductive layer positioned between them. They are electrically connected to one another adjacent the common surface, and may be electrically connected to one of the pole structures.

REFERENCES:
patent: 4504880 (1985-03-01), Church et al.
patent: 5366815 (1994-11-01), Araki et al.
patent: 5569544 (1996-10-01), Daughton
patent: 5617071 (1997-04-01), Daughton
patent: 5750275 (1998-05-01), Katz et al.
Article: "Sensitivity of Orthogonal Magnetoresistive Heads" by Wang et al., IEEE Transactions on Magnetics, vol. 29, No. 6, Nov. 1993; pp. 3820-3822.
Article: "Narrow End-On Giant Magnetoresistance READ-Head Sensors" by Pohm et al., IEEE Transactions on Magnetics, vol. 33, No. 3, May 1997; pp. 2392-2396.

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