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

Volume

42

Issue

10

fYear

2006

Firstpage

2297

Lastpage

2299

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2006.879574

Filename

1704278