Title :
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
fDate :
Oct. 31 2012-Nov. 2 2012
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;
Conference_Titel :
APMRC, 2012 Digest
Conference_Location :
Singapore
Print_ISBN :
978-1-4673-4734-1
