Laminated media for high-density recording

Author

Lambert, S.E. ; Howard, J.K. ; Sanders, I.L. ; Allegranza, O.C.

Author_Institution

IBM Corp., San Jose, CA, USA

Volume

29

Issue

1

fYear

1993

fDate

1/1/1993 12:00:00 AM

Firstpage

223

Lastpage

229

Abstract

The magnetic recording properties of laminated media structures on hard disks are discussed, including an overview of work on this topic. The primary performance advantage of laminated media is a significant reduction in media noise. The various mechanisms proposed for this noise reduction are considered. Other issues discussed include the optimal properties for the nonmagnetic interlayers, the influence of lamination on bulk magnetic properties, soft error rate measurements, and process challenges. The most important mechanism for the improved performance that has been obtained is decoupling of the noise sources in the various layers. The optimum interlayer thickness is in the range of 20-50 Å and seems to depend on the sputtering system and process conditions used

Keywords

hard discs; laminates; magnetic multilayers; magnetic recording; noise; sputter deposition; 20 to 50 angstrom; bulk magnetic properties; hard disks; high-density recording; influence of lamination; laminated media structures; magnetic recording properties; nonmagnetic interlayers; optimal properties; optimum interlayer thickness; reduction in media noise; soft error rate measurements; sputtering; Disk recording; Error analysis; Hard disks; Magnetic heads; Magnetic materials; Magnetic noise; Magnetic properties; Magnetic recording; Noise reduction; Signal to noise ratio;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.195573

Filename

195573