High-field gradient single-pole head with an improved pole structure

Author

Xia, Weixing ; Muraoka, Hiroaki ; Nakamura, Yoshihisa

Author_Institution

Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

2216

Lastpage

2218

Abstract

The relationship between the head field and the pole structure in a single-pole head is investigated by finite-element method calculation. The calculation reveals that the regular single-pole head does show a relatively large field gradient with a maximum of 150 Oe/mn, which is crucial for high-resolution recording, but only for relatively large field strength. By placing an additive pole in the vicinity of the main pole, the head-field gradient is improved. The new pole structure increases the gradient up to 250 Oe/nm. The large field gradient is obtained in a wider range of field strength than the regular single-pole head. The calculation also shows a simulated recorded transition when the large head field gradient becomes narrow.

Keywords

finite element analysis; magnetic fields; magnetic heads; perpendicular magnetic recording; additive pole; field strength; finite-element method; head field; head-field gradient; high-field gradient single-pole head; high-resolution recording; improved pole structure; large field gradient; main pole; perpendicular magnetic recording; simulated recorded transition; Anisotropic magnetoresistance; Finite element methods; Magnetic anisotropy; Magnetic flux; Magnetic heads; Magnetic recording; Permeability; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Soft magnetic materials;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.802661

Filename

1042142