Design of a metal-in-gap head for higher coercivity media

Author

Kanai, Y. ; Iizuka, M. ; Hatanai, T. ; Konishi, T.

Author_Institution

Alps Electr. Co. Ltd., Nagaoka, Japan

Volume

27

Issue

6

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

4894

Lastpage

4896

Abstract

The authors describe the design of a metal-in-gap head for high coercivity (>2 kOe) media by using the finite-element method. The secondary field at the metal-ferrite interface as well as the recording field strength and the recording field gradient is taken into consideration for the various structures of metal-in-gap heads. It is shown that by setting the film thickness of the trailing side larger than that of the leading side the secondary field can be reduced. Measured results have shown the validity of the design concept and that 33 dB of overwrite is obtained on the high coercivity (H_c=2150 Oe) medium by the designed head

Keywords

finite element analysis; magnetic heads; magnetic recording; magnetic thin film devices; design; film thickness; finite-element method; higher coercivity media; leading side; metal-ferrite interface; metal-in-gap head; recording field gradient; recording field strength; secondary field; trailing side; Coercive force; Disk recording; Fabrication; Finite element methods; Hard disks; Magnetic field measurement; Magnetic heads; Sputtering; Thickness measurement; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.278982

Filename

278982