The effect of capped layer thickness on switching behavior in coupled granular/continuous media

Author

Li, W.M. ; Lim, W.K. ; Shi, Jian Zhong ; Ding, J.

Author_Institution

Dept. of Mater. Sci. & Eng., Nat. Univ. of Singapore, Singapore, Singapore

fYear

2012

fDate

Oct. 31 2012-Nov. 2 2012

Firstpage

1

Lastpage

2

Abstract

A systematic investigation of magnetic switching behavior of CoCrPt based capped media is performed by varying the thickness of the capped layer. We find out that in the CoCrPt/SiO₂TiO₂Ta₂O₅ granular layer, CoCrPt magnetic grains are separated by nonmagnetic oxide grain boundaries. The amorphous grain boundary phase in the granular layer propagates to the top surface of the capped layer. It shows that a thicker capped layer effectively reduces macroscopic switching field distribution. Both strong exchange interactions and narrow intrinsic switching field distribution make contribution to the reduction of macroscopic switching field distribution.

Keywords

amorphous magnetic materials; chromium alloys; cobalt alloys; exchange interactions (electron); grain boundaries; granular materials; magnetic multilayers; magnetic switching; perpendicular magnetic recording; platinum alloys; silicon compounds; tantalum compounds; titanium compounds; CoCrPt-SiO₂TiO₂Ta₂O₅; amorphous grain boundary phase; capped layer thickness; capped media; coupled granular-continuous media; granular layer; macroscopic switching field distribution; magnetic grains; magnetic switching; narrow intrinsic switching field distribution; nonmagnetic oxide grain boundaries; strong exchange interactions; Amorphous magnetic materials; Magnetic field measurement; Magnetic separation; Magnetic switching; Magnetometers; Media; Switches; capped media; exchange interaction; switching field distribution; thickness;

fLanguage

English

Publisher

ieee

Conference_Titel

APMRC, 2012 Digest

Conference_Location

Singapore

Print_ISBN

978-1-4673-4734-1

Type

conf

Filename

6407600