The study of noise characteristics and overwrite on oriented and isotropic media

Author

Zhang, Bing ; Song, Mark X.

Author_Institution

MMC Technol., San Jose, CA, USA

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

2706

Lastpage

2708

Abstract

Using NiAl as a seed layer has created a unique type of 2D-isotropic media with (10.0) crystalline texture in the magnetic layer. This paper compares this type isotropic media with oriented and 3D-random isotropic media. The intrinsic signal-to-noise ratio, cross track noise, and texture-induced modulation noise have been studied in detail. The oriented media exhibits low DC erase noise and high track edge and high transition noise compared to the isotropic media of either description. The use of a NiAl seed layer on mechanically textured substrates inducing a magnetic film (10.0) texture can reduce texture noise. Overwrite (OW) measurements clearly separate the studied media into two distinct categories

Keywords

magnetic recording noise; magnetic thin films; texture; DC erase noise; NiAl; NiAl seed layer; cross track noise; crystalline texture; isotropic medium; magnetic recording; magnetic thin film; modulation noise; oriented medium; overwrite characteristics; signal-to-noise ratio; track edge noise; transition noise; Chromium; Coercive force; Crystallization; Magnetic anisotropy; Magnetic films; Magnetic noise; Magnetic separation; Perpendicular magnetic anisotropy; Signal to noise ratio; Substrates;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800959

Filename

800959