DocumentCode :
3560217
Title :
Compositional Structure and Magnetic Properties of 
Perpendicular Recording Medium
Author :
Futamoto, Masaaki ; Handa, Takahiro ; Takahashi, Yoshio
Author_Institution :
Fac. of Sci. & Eng., Chuo Univ., Tokyo
Volume :
44
Issue :
11
fYear :
2008
Firstpage :
3488
Lastpage :
3491
Abstract :
The diameter and compositional variations of magnetic crystal grains in a CoCrPt-SiOx perpendicular magnetic recording medium were investigated by using a transmission electron microscope equipped with an energy-dispersive X-ray spectrometer. The grain boundary composition was estimated from the average film and the average grain compositions by taking account of their volumes. It has been shown that the composition of individual grain depends little on grain diameter. The variations in the magnetic anisotropy energy and the saturation magnetization are estimated from the compositions of individual magnetic crystal grains. The thermal stability of magnetic crystal grain is discussed on the basis of the estimated K u V/kT value.
Keywords :
X-ray chemical analysis; chromium alloys; cobalt alloys; grain boundaries; magnetic anisotropy; perpendicular magnetic recording; platinum alloys; silicon compounds; thermal stability; transmission electron microscopy; CoCrPt-SiOx; compositional structure; energy-dispersive X-ray spectrometer; grain boundary composition; magnetic anisotropy energy; magnetic crystal grains; magnetic properties; perpendicular magnetic recording medium; saturation magnetization; thermal stability; transmission electron microscope; $hbox{CoCrPt-SiO}_{rm X}$ ; composition; perpendicular recording medium; thermal stability; transmission electron microscope;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2008.2002509
Filename :
4717567
Link To Document :
