Jitter reduction by using a continuous hard-magnetic layer for perpendicular recording media

Author

Miura, Kenji ; Muraoka, Hiroaki ; Sonobe, Yoshiaki ; Nakamura, Yoshihisa

Author_Institution

Res. Inst. of Electr. Commun., Tohoku Univ., Miyagi, Japan

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

2054

Lastpage

2056

Abstract

Reduction of medium noise is crucial in perpendicular magnetic recording. The coupled granular and continuous (CGC) medium that has layered continuous and granular films is a candidate for obtaining high SNR. We investigated noise characteristics of the CGC double-layered medium by focusing on transition jitter and a magnetization transition analysis with an MFM. Results from analysis of waveform and MFM images show that transition smoothing is considered to take place by depositing the continuous layer. Transition jitter is reduced with a CGC structure. Also high thermal stability is simultaneously achieved.

Keywords

granular materials; jitter; magnetic force microscopy; magnetic multilayers; magnetic recording noise; magnetic transitions; magnetisation; perpendicular magnetic recording; thermal stability; waveform analysis; CGC double-layered medium; MFM images; continuous hard-magnetic layer; coupled granular continuous medium; high SNR; jitter reduction; layered continuous granular films; magnetization transition analysis; medium noise reduction; noise characteristics; perpendicular recording media; thermal stability; transition jitter; transition smoothing; waveform analysis; Image analysis; Jitter; Magnetic analysis; Magnetic films; Magnetic force microscopy; Magnetic noise; Magnetization; Noise reduction; Perpendicular magnetic recording; Signal to noise ratio;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.802696

Filename

1042088