Physically based information science of magnetic recording. I. Information capacity of a medium model

Author

O´Sullivan, J.A. ; Porter, D.G. ; Indeck, R.S. ; Muller, M.W.

Author_Institution

Dept. of Electr. Eng., Washington Univ., St. Louis, MO, USA

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

4036

Lastpage

4038

Abstract

The data processing inequality of information theory states that no recording system using a medium can achieve a capacity greater than the capacity of the medium itself. The authors describe an efficient method for determining the storage capacity of a magnetic storage medium. The method is applied to a medium model consisting of a tessellation of magnetic grains and obtain a numerical measure of the storage capacity. It is found that intergranular dipolar and exchange interactions reduce the storage capacity below that of a tessellation of noninteracting grains

Keywords

channel capacity; information theory; magnetic recording; magnetic storage; numerical analysis; data processing inequality; exchange interactions; information capacity; information science; information theory states; intergranular dipolar interactions; magnetic grains tessellation; magnetic recording; magnetic storage medium; medium model; numerical measure; storage capacity; Channel capacity; Data processing; Information retrieval; Information science; Information theory; Magnetic analysis; Magnetic memory; Magnetic recording; Physics computing; Transducers;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281382

Filename

281382