Title :
Optimization of Precompensation for NLTS in Perpendicular Magnetic Recording
Author :
Miura, Kenji ; Seki, Kenta ; Hashimoto, Mitsuhiro ; Muraoka, Hiroaki ; Aoi, Hajime ; Nakamura, Yoshihisa
Author_Institution :
RIEC, Sendai
Abstract :
Nonlinear transition shift (NLTS) and nonlinear amplitude distortion (NLAD) in perpendicular magnetic recording were investigated for CoPtCr-SiO2 media with various SiO2 contents that have various inter-granular exchange coupling. The tighter inter-granular coupling increases both NLTS and NLAD. The NLTS and NLAD were discriminated and extracted NLTS showed that perpendicular media exhibited the opposite shift to longitudinal media as theoretically expected. Careful precompensation optimization is required to obtain a good error-rate performance at high-linear densities
Keywords :
chromium alloys; cobalt alloys; magnetic particles; magnetic transitions; perpendicular magnetic recording; platinum alloys; silicon compounds; CoPtCr-SiO2; NLAD; NLTS; error-rate performance; high-linear densities; inter-granular exchange coupling; nonlinear amplitude distortion; nonlinear transition shift; partial erasure; perpendicular magnetic recording; precompensation optimization; Coercive force; Couplings; Harmonic distortion; Jitter; Magnetic heads; Magnetic hysteresis; Magnetic separation; Nonlinear distortion; Perpendicular magnetic recording; Writing; Nonlinear amplitude distortion (NLAD); nonlinear transition shift (NLTS); partial erasure; perpendicular magnetic recording; precompensation;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.879574
