Dynamic Write/Read Characteristics of Alumina Nanohole Patterned Media With a Soft Underlayer Measured With a Perpendicular Magnetic Head

Author

Oshima, Hirotaka ; Kikuchi, Hideyuki ; Nakao, Hiroshi ; Kamimura, Takuya ; Morikawa, Takeshi ; Matsumoto, Koji ; Yuan, Jianfeng ; Ishio, Shunji ; Nishio, Kazuyuki ; Masuda, Hideki ; Itoh, Ken-ichi

Author_Institution

Yamagata Fujitsu, Ltd, Higashine

Volume

43

Issue

6

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

2148

Lastpage

2150

Abstract

We present dynamic write/read characteristics of alumina nanohole patterned media having a soft magnetic underlayer (SUL), which offer good flyability of a perpendicular magnetic head with a flight height of 10 nm. Increase in the head-field gradient in the recording layer owing to the SUL was confirmed by measurements of signal-to-noise ratio and isolated magnetic transition width. The writability of the magnetic nanopillars was clearly demonstrated by visualization of the recorded patterns with a magnetic force microscope

Keywords

alumina; magnetic force microscopy; magnetic heads; magnetic transitions; nanostructured materials; perpendicular magnetic recording; Al₂O₃; alumina nanohole patterned media; dynamic write-read characteristics; head-field gradient; isolated magnetic transition; magnetic force microscope; magnetic nanopillars; perpendicular magnetic head; recording layer; signal-to-noise ratio; soft magnetic underlayer; Laboratories; Magnetic force microscopy; Magnetic forces; Magnetic heads; Magnetic separation; Manufacturing; Performance evaluation; Perpendicular magnetic recording; Scanning electron microscopy; Soft magnetic materials; Nanohole arrays; patterned media; perpendicular magnetic recording; soft magnetic underlayer (SUL);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2007.893127

Filename

4202869