Greer, Burns & Crain, Ltd.
Magnetoresistive head
 A magnetoresistive head used for reading information signals from a magnetic recording medium using a spin valve magnetoresistance effect, comprises a first ferromagnetic layer and a second ferromagnetic layer both are separated by a first nonmagnetic metal layer, a hard magnetic layer formed so as to contact to the second ferromagnetic layer, and a third ferromagnetic layer formed on the hard magnetic layer via a second nonmagnetic metal layer for shutting off exchange coupling and coupled to the second ferromagnetic layer and the hard magnetic layer by static magnetic combination. 
Fujitsu Limited
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Hitoshi Hideyuki Mitsuru Kazuo
Kishi Kikuchi Otagiri Kobayashi