Magnetic head

Details Magnetic head Magnetic head

1997-01-28

1998-06-09

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Core

G11B 5133

Patent

active

057644551

ABSTRACT:
This invention provides a magnetic head suitably used for replay because of its giving a high output with a low noise. A magnetic head suitable for replay is provided which is made of a pair of magnetic cores 1 and 2 facing each other with a magnetic gap g.sub.1, in between and composed of composite ferrites consisting of monocrystal ferrites 9 and 11, and polycrystal ferrites 10 and 12 each containing 52-54 mol % of Fe.sub.2 O.sub.3, 24-26 mol % of ZnO and 20-24 mol % of MnO. Further, the monocrystal ferrites 9 and 11 are allowed to take the same orientation with a so-called VHS direction. Furthermore, the fusion glass 3 to bond the magnetic cores 1 and 2 is allowed to have a linear thermal expansion coefficient less by 20.times.l0.sup.-7 -26.times.10.sup.-7 than that of the composite ferrites composing the magnetic cores 1 and 2, at temperatures from 100.degree. to 350.degree. C.

REFERENCES:
patent: 5515222 (1996-05-01), Kumagai et al.

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