Title :
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
fDate :
6/1/2007 12:00:00 AM
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);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2007.893127
