Four layer magnetoresistance device and method for making a four

Details Four layer magnetoresistance device and method for making a four Four layer magnetoresistance device and method for making a four

1992-11-06

1994-12-13

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Magnetometers

338 32R, 360113, 29603, G01R 3302, H01L 4308, G11C 1908, G11B 539

Patent

active

053732383

ABSTRACT:
A magnetoresistive device is described for detecting magnetic fields incorporating a sandwich structure of four layers, two of which are ferromagnetic and which are separated by a non-ferromagnetic metallic layer and where one ferromagnetic layer is adjacent a fourth antiferromagnetic layer and exhibiting exchange anisotropy with the adjacent ferromagnetic layer. The invention overcomes the problem of small changes in magnetoresistance and in controlling the magnetization response of the magnetoresistive device.

REFERENCES:
patent: 4103315 (1978-07-01), Hempstead et al.
patent: 5014147 (1991-05-01), Parkin et al.
patent: 5159513 (1992-10-01), Dieny et al.
patent: 5206590 (1993-04-01), Dieny et al.

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