Magnetic head having an Fe-Ni-X layer

Details Magnetic head having an Fe-Ni-X layer Magnetic head having an Fe-Ni-X layer

2006-02-21

2006-02-21

Tupper, Robert S. (Department: 2652)

Dynamic magnetic information storage or retrieval

Head

Core

Reexamination Certificate

active

07002778

ABSTRACT:
A magnetic head including a lower core layer and an upper core layer, a non-magnetic gap layer and a coil layer. The upper core layer is made of an FeNiX (X being an element of one of rhenium Re and molybdenum Mo). A concentration difference of the upper core layer between a concentration of iron by weight percent and a concentration of the element X by weight percent is set to be larger at a leading edge of the upper core layer than at a position of the upper core layer more backward than the leading edge. In this arrangement, the magnetic head is provided with improved overwrite characteristics and accommodates the use of high-frequency recording signals.

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