Dynamic magnetic information storage or retrieval – Head – Core
Patent
1981-09-22
1984-05-22
Hecker, Stuart N.
Dynamic magnetic information storage or retrieval
Head
Core
360127, G11B 512, G11B 522
Patent
active
044504942
ABSTRACT:
A magnetic head having a magnetic core formed by facing a pair of magnetic substances through a working gap at a head section confronting a magnetic recording medium is disclosed in which at least one of the magnetic substances has magnetic anisotropy, and an angle .alpha. (in a C-shaped core half) and/or an angle .alpha.' (in an I-shaped core half) between a core surface confronting the magnetic recording medium and a direction having a maximum magnetic permeability in a main magnetic circuit plane of the magnetic substance having magnetic anisotropy is made larger than an orientation angle of the above direction for making minimum the magnetic reluctance of the main magnetic circuit of the magnetic core by .beta. (for .alpha.) and/or .beta.' (for .alpha.') to improve the recording/reproducing characteristic of the magnetic head, where .beta. is given by a formula ##EQU1## is equal to or less than 25.degree., D indicates a depth of the working gap, L* indicates an effective length of an oblique part for forming the working gap, and min [a, b] indicates the smaller of a and b.
REFERENCES:
patent: 3810245 (1974-05-01), Ozawa et al.
patent: 4245269 (1981-01-01), Yasinavichjus et al.
patent: 4246619 (1981-01-01), Hirai et al.
Fujiwara Hideo
Kimura Takeshi
Kudo Mitsuhiro
Kumasaka Noriyuki
Shinagawa Kiminari
Hecker Stuart N.
Hitachi , Ltd.
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