Dynamic field distributions of thin film inductive heads

Author

Takano, Hisashi ; Sasaki, Shinobu ; Shinada, Hiroyuki ; Shiiki, Kazuo ; Sugita, Yutaka

Author_Institution

Hitachi Ltd., Tokyo, Japan

Volume

28

Issue

5

fYear

1992

fDate

9/1/1992 12:00:00 AM

Firstpage

2106

Lastpage

2108

Abstract

Dynamic recording fields of thin-film inductive disk drive heads and the relationships to drive current, pole thickness, and pole materials have been investigated. Electron beam tomography was used to directly observe the recording fields. With Permalloy heads, improved frequency responses were achieved by exciting the magnetic core with higher drive currents. However, increases in the pole thickness significantly degraded the frequency responses. The amorphous CoTaZr head showed superior frequency response, and constant field intensity was maintained up to 30 MHz, regardless of drive current

Keywords

Permalloy; cobalt alloys; frequency response; magnetic fields; magnetic heads; magnetic recording; magnetic thin film devices; tantalum alloys; zirconium alloys; 1 to 30 MHz; Permalloy heads; amorphous CoTaZr head; disk drive heads; drive current; dynamic recording fields; electron beam tomography; field distributions; frequency responses; magnetic core; pole materials; pole thickness; thin film inductive heads; Disk drives; Disk recording; Electron beams; Frequency; Magnetic cores; Magnetic heads; Magnetic materials; Magnetic recording; Tomography; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.179411

Filename

179411