The role of SUL in readback and linear density limitation imposed

Author

Jian-Gang Zhu ; Bai, D. ; Torabi, A.

Author_Institution

Data Storage Syst. Center, Carnegie Mellon Univ., Pittsburgh, PA, USA

fYear

2003

fDate

6-8 Jan. 2003

Firstpage

63

Abstract

In perpendicular recording, soft underlayer (SUL) is critical for achieving a high field magnitude and large field gradient. Previous experimental and modeling studies have found that the presence of SUL significantly degrades the readback performance at high linear densities In this paper, the role of the SUL in readback is studied via a combined micromagnetic modeling and analytical investigation for obtaining a more complete understanding of the linear density limitations imposed.

Keywords

magnetic heads; magnetic shielding; micromagnetics; modelling; perpendicular magnetic recording; soft magnetic materials; storage media; SUL; field gradient; field magnitude; linear density limitations; micromagnetic modeling; perpendicular recording; readback performance; soft magnetic shields; soft underlayer; spin valve head; Degradation; Geometry; Magnetic heads; Magnetic separation; Magnetic shielding; Micromagnetics; Perpendicular magnetic recording; Soft magnetic materials; Spin valves; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Joint NAPMRC 2003. Digest of Technical Papers [Perpendicular Magnetic Recording Conference]

Conference_Location

Monterey, CA, USA

Print_ISBN

0-7803-7746-X

Type

conf

DOI

10.1109/NAPMRC.2003.1177067

Filename

1177067