Magnetic and Microstructural Properties of CoCrPt:Oxide Perpendicular Recording Media With Novel Intermediate Layers

Author

Piramanayagam, S.N. ; Shi, J.Z. ; Zhao, H.B. ; Pock, C.K. ; Mah, C.S. ; Ong, C.Y. ; Zhao, J.M. ; Zhang, J. ; Kay, Y.S. ; Lu, L.

Author_Institution

Data Storage Inst., Singapore

Volume

43

Issue

2

fYear

2007

Firstpage

633

Lastpage

638

Abstract

Novel recording media layer structures for reducing the spacing between the soft magnetic underlayer and the writing head have been studied. In this paper, the kink in Kerr loops at zero fields is explained to arise from the depth-sensitive Kerr effect. Novel intermediate layer structures with two (RuCu) or three elements (RuCr:Oxide) are also proposed to reduce the grain size in the intermediate layer. This would, in turn, lead to a reduced grain size and grain size distribution in the CoCrPt:SiO₂ recording layer

Keywords

chromium alloys; cobalt alloys; grain size; magnetic heads; magnetic multilayers; perpendicular magnetic recording; platinum alloys; ruthenium alloys; CoCrPt:O₂; Kerr loops; RuCr:O₂; depth-sensitive Kerr effect; grain size distribution; intermediate layers; magnetic properties; microstructural properties; perpendicular recording media; soft magnetic underlayer; writing head; Amorphous magnetic materials; Crystallization; Grain size; Magnetic properties; Magnetic recording; Mechanical engineering; Mechanical factors; Memory; Perpendicular magnetic recording; Soft magnetic materials; Grain size; Kerr rotation; intermediate layer; perpendicular magnetic recording;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2006.888206

Filename

4069062