DocumentCode
763710
Title
Pt-Cr Alloy Intermediate Layer for CoCrPt-SiO 
Granular Perpendicular Recording Media
Author
Nemoto, Hiroaki ; Araki, Ryoko ; Hosoe, Yuzuru
Author_Institution
Central Res. Lab., Hitachi Ltd., Kanagawa, Japan
Volume
42
Issue
10
fYear
2006
Firstpage
2336
Lastpage
2338
Abstract
We studied Pt-Cr binary alloys as a possible material for the intermediate layer (IML) in CoCrPt-SiO2 perpendicular recording media. We investigated the magnetic properties, structural properties, and recording performance of CoCrPt-SiO2 media with Pt-Cr alloy IMLs as a function of the Cr composition in the Pt-Cr IMLs. The CoCrPt-SiO2 media exhibited the best recording performance at the Cr composition from 20 to 30 at.%, where the structural and magnetic defects in the CoCrPt-SiO2 layers appeared to be minimized. Plan-view transmission electron microscopy images revealed that the addition of Cr into a Pt IML reduces the size of the crystal grains in the IML and promotes the formation of the oxide grain boundary in the CoCrPt-SiO2 layers.
Keywords
chromium alloys; cobalt alloys; grain boundaries; magnetic multilayers; perpendicular magnetic recording; platinum alloys; silicon compounds; transmission electron microscopy; CoCrPt-SiO2; IML; PtCr; granular perpendicular recording media; intermediate layer; magnetic defects; magnetic properties; oxide grain boundary; structural defects; structural properties; transmission electron microscopy images; Chromium; Grain boundaries; Magnetic anisotropy; Magnetic field measurement; Magnetic properties; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Saturation magnetization; Sputtering; Transmission electron microscopy; Co-Cr-Pt alloys; Pt-Cr alloys; granular structure; oxide grain boundary; perpendicular recording;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/TMAG.2006.878680
Filename
1704291
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