DocumentCode :
1244136
Title :
Granular 
Thin Films With Perpendicular Hard Magnetic Properties for Perpendicular Magnetic Recording Media
Author :
Chen, S.C. ; Kuo, P.C. ; Hsu, S.L. ; Lin, G.P. ; Ou, S.L. ; Sun, T.H.
Author_Institution :
Dept. of Mater. Eng., Ming Chi Univ. of Technol., Taipei
Volume :
45
Issue :
5
fYear :
2009
fDate :
5/1/2009 12:00:00 AM
Firstpage :
2280
Lastpage :
2283
Abstract :
The granular hcp Co3Pt nano-grains with large perpendicular coercivity (Hcperp) of 3800 Oe and high perpendicular squareness (Sperp) of 0.93 can be achieved by deposited 14 nm thickness of Co3Pt magnetic layer onto the Pt underlayer with thickness of 200 nm and annealing at low temperature of 300degC in a vacuum of 1 mTorr. It is found that the oxygen atoms would diffuse into Co3Pt layer through inter-grains to isolate Co3Pt grains and prevent grain growth that will decrease inter-grains interaction and enhance recording density of the magnetic film. This film revealed its prominent potential to be applied as perpendicular magnetic recording media for ultra high-density recording.
Keywords :
annealing; cobalt alloys; coercive force; diffusion; discontinuous metallic thin films; magnetic thin films; nanostructured materials; permanent magnets; perpendicular magnetic recording; platinum alloys; Co3Pt; Pt; annealing; diffusion; granular hcp nanograins; granular thin films; intergrains interaction; magnetic film; magnetic layer; oxygen atoms; perpendicular coercivity; perpendicular hard magnetic property; perpendicular magnetic recording media; perpendicular squareness; pressure 1 mtorr; size 14 nm to 200 nm; temperature 300 degC; ultra high-density recording; vacuum; Granular $hbox{Co}_{3}hbox{Pt}$ nano-grains; perpendicular coercivity; perpendicular magnetic recording media; perpendicular squareness;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2009.2016446
Filename :
4816013
Link To Document :
