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

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

2259

Lastpage

2261

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800792

Filename

800792