Theoretical analysis of longitudinal and perpendicular recording potential

Author

Richter, H.J. ; Champion, E.C. ; Peng, Q.

Author_Institution

Seagate Technol. LLC, Fremont, CA, USA

Volume

39

Issue

2

fYear

2003

fDate

3/1/2003 12:00:00 AM

Firstpage

697

Lastpage

703

Abstract

The recording potentials of perpendicular recording with a magnetically soft underlayer and of longitudinal recording are compared theoretically under the constraint of write-ability and thermal stability. In contrast to longitudinal media, it is found that optimized perpendicular media require weak exchange interaction between the grains. It is concluded that the potential of longitudinal recording and perpendicular recording with a pole head is not significantly different. Shielded write heads boost the performance of perpendicular recording by 4 to 5 dB.

Keywords

magnetic hysteresis; magnetic recording noise; perpendicular magnetic recording; thermal stability; hysteresis loop; longitudinal recording; magnetically soft underlayer; optimized perpendicular media; perpendicular recording; pole head; shielded write heads; slope model; thermal decay; thermal stability; weak exchange interaction; write-ability; Anisotropic magnetoresistance; Elementary particle exchange interactions; Magnetic anisotropy; Magnetic heads; Magnetic hysteresis; Magnetic materials; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Saturation magnetization; Thermal stability;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2003.808996

Filename

1190087