Investigation of particulate media with an ultra-thin magnetic layer suitable for MR heads on a rotating drum

Author

Ejiri, Kiyomi ; Sugizaki, Tsutomu ; Taguchi, Ryo ; Majima, Keigo ; Muto, Kazutoshi ; Uehara, Toshihiro ; Okuda, Haruo

Author_Institution

Fuji Photo Film Co. Ltd., Tokyo, Japan

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

1605

Lastpage

1608

Abstract

To improve recording density and data transfer rate, we investigated the electromagnetic characteristics of the combination of the MP with an ultra-thin magnetic layer (U-MP) and MR head on a rotating drum. The magnetic layer thickness was reduced to 40-90 nm, and the magnetic particles volume was one-third of conventional ones. Reproduced output of the U-MP/MR combination was at least ten times higher than that of the combination of a conventional MP and MIG head. The areal recording density was estimated to be 6 times as large as that of the conventional MP/MIG combination

Keywords

magnetic heads; magnetic particles; magnetic recording; magnetoresistive devices; MR heads; areal recording density; data transfer rate; electromagnetic characteristics; magnetic layer thickness; magnetic particles volume; particulate media; recording density; rotating drum; ultra-thin magnetic layer; Disk recording; Drives; Electromagnetic measurements; Hard disks; Magnetic heads; Magnetic particles; Magnetic recording; Pulse measurements; Saturation magnetization; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.950914

Filename

950914