Combination magnetoresistive/inductive thin film magnetic head a

Details Combination magnetoresistive/inductive thin film magnetic head a Combination magnetoresistive/inductive thin film magnetic head a

1998-01-30

2000-11-21

Kiliman, Leszek

Stock material or miscellaneous articles

Composite

Of inorganic material

428611, 428612, 428627, 428629, 428639, 428641, 428660, 428667, 428670, 428678, 428694TR, 428694T, 428694TS, 428694TM, 428900, 360113, 324252, G11B 566

Patent

active

061500461

ABSTRACT:
A thin film magnetic head includes an upper core layer and a lower core layer which are made of an Fe--M--O alloy, an Fe--M--T--O alloy or an NI--Fe--X alloy so that the upper core layer has a high saturation magnetic flux density, low coercive force and high resistivity, and the lower core layer has a lower saturation magnetic flux density than the upper core layer, low coercive force, high resistivity, and a low magnetostriction constant. Also the lower core layer is formed so that the thickness gradually decreases toward both side ends, and a gap layer can be formed on the lower core layer to have a uniform thickness. Since the lower core layer is formed by sputtering, a material having excellent soft magnetic material can be used, thereby enabling recording at high frequency.

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