Title :
Effect of perpendicular layer thickness on read/write characteristics of perpendicular/longitudinal composite media using ring-type head
Author :
Kurokawa, Yoshiaki ; Nagasaki, Akira ; Homma, Takayuki ; Osaka, Tetsuya
Author_Institution :
Dept. of Appl. Chem., Waseda Univ., Tokyo, Japan
fDate :
9/1/1996 12:00:00 AM
Abstract :
The effects of perpendicular layer thickness on remanent magnetization states and recording characteristics of perpendicular-longitudinal composite media were investigated. The contribution of perpendicular magnetic reversal is varied due to a change in the thickness of perpendicular layer; the transition length of the thinner perpendicular layer medium was broader than that of thicker perpendicular medium. The medium with thicker perpendicular layer shown better performance not only in recording density response but also peak shift characteristics. In order to realize excellent read/write characteristics, optimization of the thickness of perpendicular layer becomes one of the important factors, in addition to the optimization of the underlayer parameters
Keywords :
magnetisation reversal; perpendicular magnetic recording; remanence; magnetic reversal; peak shift; perpendicular layer thickness; perpendicular/longitudinal composite media; read/write characteristics; recording density; remanent magnetization; ring-type head; transition length; underlayer parameters; Ferrites; Magnetic flux; Magnetic heads; Magnetic properties; Magnetization; Perpendicular magnetic recording; Space vector pulse width modulation; Testing; Voltage; Writing;
Journal_Title :
Magnetics, IEEE Transactions on
