Role of medium noise in recording with CoCrTa/Pt multilayers

Author

Ho, Kuoksan ; Mei, Lin ; Lairson, Bruce M. ; Kim, Young K. ; Noyes, George I. ; Payne, Alex

Author_Institution

Dept. of Mater. Sci., Rice Univ., Houston, TX, USA

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3082

Lastpage

3084

Abstract

Magnetometry and recording noise measurements were made and compared for multilayers with various saturation magnetizations. A correlation between magnetization and noise as measured with magnetoresistive heads was found. Nevertheless, δM plots indicated weak intergranular exchange coupling for all of our CoCrTa/Pt multilayers, suggesting that magnetostatic energy plays a role in the noise amplitude. Recording using a peak detect channel was performed. Using the Katz-Campbell noise model, the measured error rates were in agreement with the measured noise power

Keywords

chromium alloys; cobalt alloys; exchange interactions (electron); magnetic multilayers; magnetic recording noise; magnetisation; platinum; tantalum alloys; CoCrTa-Pt; CoCrTa/Pt multilayer; Katz-Campbell model; error rate; intergranular exchange coupling; magnetometry; magnetoresistive head; magnetostatic energy; peak detect channel; recording noise power; saturation magnetization; Couplings; Magnetic heads; Magnetic multilayers; Magnetoresistance; Magnetostatics; Noise level; Noise measurement; Nonhomogeneous media; Power measurement; Saturation magnetization;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617851

Filename

617851