Title :
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
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.888206
