Study of multilayer films for magnetic recording

Author

Duan, Shanlin ; Khan, Mahbub R. ; Lee, Sang Y. ; Pressesky, Jason L. ; Tang, Li ; Thomas, Gareth

Author_Institution

Seagate Magnetics, Fremont, CA, USA

Volume

27

Issue

6

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

5055

Lastpage

5057

Abstract

The magnetic and recording properties of single and multi-magnetic layer media were studied. The bulk magnetic properties of the samples are similar. Media noise of multilayer media is significantly lower than that of single layer media. Increase in media SNR (signal-to-noise ratio) depends on the MrT value and the number of magnetic layers. For double and triple magnetic layer media the increase in SNR ranges from 3.3 to 5.5 dB. Interaction study results using the Kelly plot method indicate that single-layer media are characterized by positive interaction, which is likely due to the exchange coupling between grains. By laminating the magnetic layer, positive interaction decreased and negative interaction increased, probably due to a negative magnetostatic interaction between magnetic layers

Keywords

magnetic recording; magnetostatics; noise; Kelly plot method; bulk magnetic properties; exchange coupling; grains; magnetic recording; magnetostatic interaction; media SNR; multi-magnetic layer media; multilayer films; negative interaction; positive interaction; recording properties; single-layer media; Chromium; Low-frequency noise; Magnetic films; Magnetic multilayers; Magnetic noise; Magnetic properties; Magnetic recording; Magnetostatics; Remanence; Sputtering;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.278738

Filename

278738