Perpendicular recording heads for areal densities over 100 Gb/in/sup 2/

Author

Nakamoto, K. ; Kawato, Y. ; Yoshida, N. ; Okada, Y. ; Hatatani, M. ; Mochizuki, M. ; Watanabe, K. ; Fuyama, M.

Author_Institution

Central Res. Lab., Hitachi Ltd., Kanagawa, Japan

fYear

2003

fDate

6-8 Jan. 2003

Firstpage

59

Abstract

Perpendicular recording with sufficient thermal stability has great potential for next-generation recording with areal densities over 100 Gb/in/sup 2/. One of the biggest problems for single-pole writers is head-induced erasure, such as erase-after-write This erasure is due to the high remanent magnetization of the main pole. We fabricated single-pole writers with a domain stabilization technique to reduce the remanence, and highly sensitive tunneling magnetoresistive (TMR) readers for 100 Gb/in/sup 2/ perpendicular recording.

Keywords

digital magnetic recording; magnetic disc storage; magnetic heads; magnetoresistive devices; perpendicular magnetic recording; remanence; thermal stability; tunnelling magnetoresistance; domain stabilization technique; head-induced erasure; highly sensitive readers; perpendicular recording heads; remanence reduction; single-pole writers; thermal stability; tunneling magnetoresistive readers; Magnetic anisotropy; Magnetic domains; Magnetic flux; Magnetic heads; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Remanence; Saturation magnetization; Thermal stability; Tunneling magnetoresistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Joint NAPMRC 2003. Digest of Technical Papers [Perpendicular Magnetic Recording Conference]

Conference_Location

Monterey, CA, USA

Print_ISBN

0-7803-7746-X

Type

conf

DOI

10.1109/NAPMRC.2003.1177063

Filename

1177063