Title :
Degradation of recording performance in high-speed recording
Author :
Ikekame, Hiroshi ; Yamashita, Takeo ; Ide, Hiroshi ; Takano, Hisashi ; Nishiyama, Nobumasa ; Tsuyoshi, Toshiaki ; Shiroishi, Yoshihiro ; Aoi, Hajime
Author_Institution :
Central Res. Lab., Hitachi Ltd., Tokyo, Japan
fDate :
9/1/1999 12:00:00 AM
Abstract :
Effects of dynamic coercivity on recording performance at write frequencies of 10-250 MHz and medium velocity of 20-50 m/s were investigated. It was found that degradation of signal-to noise ratio and roll off characteristics in high-speed recording is extremely small, and degradation of nonlinear transition shift is mainly due to the rise time of the magnetic field in the write head. Moreover, overwrite characteristics degrade significantly because of dynamic coercivity effects
Keywords :
coercive force; magnetic recording; magnetic recording noise; 10 to 250 MHz; 20 to 50 m/s; dynamic coercivity effects; high-speed recording; magnetic field rise time; medium velocity; nonlinear transition shift; overwrite characteristics; recording performance degradation; roll off characteristics; signal-to noise ratio; write frequency; Coercive force; Degradation; Disk recording; Frequency; Magnetic fields; Magnetic heads; Magnetic recording; Performance evaluation; Testing; Velocity measurement;
Journal_Title :
Magnetics, IEEE Transactions on
