Noise characteristics and writeability on perpendicular recording media

Author

Li, Shaoping ; Lei, Wang ; Zhu, Wenzhong ; Chen, Jian ; Kaiser, David ; Michel, Rich ; Vonfeldt, Jack ; Palmer, Dean ; Weispfenning, James

Author_Institution

Seagate Technol. LLC, Bloomington, MN, USA

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

2027

Lastpage

2029

Abstract

A FFT-filtering-IFFT technique, based on magnetic force microscopy (MFM) image analysis, has been employed to extract and then analyze the perpendicular media noise and its characteristics at various linear densities. The experimental results from examined media indicate that the predominant media noise at high recording density originate from a magnetic cluster formation and coarsening process, suggesting that one of the present difficulties for achieving high linear density in perpendicular recording scheme resides in the head/media writeability issues.

Keywords

fast Fourier transforms; magnetic force microscopy; magnetic heads; magnetic multilayers; magnetic recording noise; perpendicular magnetic recording; FFT-filtering-IFFT technique; coarsening process; head/media writeability issues; high recording density; linear densities; magnetic cluster formation; magnetic force microscopy image analysis; multilayer media; noise characteristics; perpendicular recording media; Image analysis; Magnetic analysis; Magnetic force microscopy; Magnetic forces; Magnetic heads; Magnetic multilayers; Magnetic noise; Microstructure; Perpendicular magnetic recording; Transmission electron microscopy;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.801820

Filename

1042079