Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1996-04-03
1998-04-21
Evans, Jefferson
Dynamic magnetic information storage or retrieval
Head
Hall effect
338 32R, 324252, G11B 539, G01R 3309
Patent
active
057424586
ABSTRACT:
A giant magnetoresistive material film includes at least two ferromagnetic layers of a NiFe alloy or NiFeCo alloy, which are formed on a substrate through a nonmagnetic layer of Au, Ag, Cu or Cr, wherein magnetization of at lest one of the ferromagnetic layers is pinned by a coercive force increasing layer of .alpha.-Fe.sub.2 O.sub.3 provided adjacent thereto and having a thickness of 200 to 1000 .ANG. so as to increase coercive force of the ferromagnetic layer, and the other ferromagnetic layer has free magnetization so as to produce a change in resistance at a low magnetic field. The present invention also provides a method of producing the giant magnetoresistive material film and a magnetic head provided with the giant magnetoresistive material film.
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Hasegawa Naoya
Koike Fumihito
Alps Electric Co. ,Ltd.
Evans Jefferson
Shoup Guy W.
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