Areal density limits for perpendicular magnetic recording

Author

Victora, R.H. ; Xue, Jianhua ; Patwari, Mohammed

Author_Institution

Dept. of Electr. & Comput. Eng., Minnesota Univ., Minneapolis, MN, USA

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

1886

Lastpage

1891

Abstract

A strategy for high-density perpendicular magnetic recording with a soft underlayer is introduced. The approach is based on three concepts: 1) the nonzero magnetic susceptibility of the recording layer; 2) the use of intergranular exchange to partially cancel magnetostatic effects; and 3) a novel head architecture. Micromagnetic simulations involving recording head, soft underlayer, and recording layer are employed to specify a particularly advantageous design. It is shown that the expected density approaches 1 Tbit/in².

Keywords

exchange interactions (electron); magnetic heads; magnetic hysteresis; magnetic permeability; magnetic susceptibility; perpendicular magnetic recording; areal density limits; head architecture; hysteresis loops; intergranular exchange; magnetostatic effects cancellation; micromagnetic simulations; nonzero magnetic susceptibility; permeability; perpendicular magnetic recording; recording head; recording layer; soft underlayer; Fluctuations; Magnetic anisotropy; Magnetic flux; Magnetic heads; Magnetic recording; Magnetostatics; Micromagnetics; Permeability; Perpendicular magnetic anisotropy; Perpendicular magnetic recording;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.802791

Filename

1042034