Title :
Soft underlayer noise in perpendicular recording and its impact on error rate
Author :
Xiao, Min ; Wilson, Bruce ; Takano, Kentaro ; Do, Hoa ; Ikeda, Yoshihiro ; Rosen, Hal
Author_Institution :
San Jose Res., Hitachi GST, San Jose, CA, USA
Abstract :
Minimum soft underlayer thickness for adequate flux conduction was established through experiment and calculation. Methods for suppressing stripe domains were discussed. Characteristics of spike noise in laminated soft underlayers were described, and the impact of spike noise on error rate was assessed using a software channel. The correlation between spike noise and errors was weak.
Keywords :
error statistics; magnetic domains; magnetic flux; magnetic recording noise; perpendicular magnetic recording; soft magnetic materials; error rate; flux conduction; laminated soft underlayer; perpendicular recording; soft underlayer noise; soft underlayer thickness; software channel; spike noise; stripe domains; Annealing; Error analysis; Glass; Magnetic domains; Magnetic flux; Magnetic heads; Magnetic noise; Perpendicular magnetic recording; Soft magnetic materials; Sputtering; Perpendicular recording; soft underlayer; spike noise; stripe domains;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.855277
