Title :
Low noise performance of CoCrPt single-layer perpendicular magnetic recording media
Author :
Hirayama, Yoshiyuki ; Kikukawa, Atsushi ; Honda, Yukio ; Shimizu, Noboru ; Futamoto, Masaaki
Author_Institution :
Central Res. Lab., Hitachi Ltd., Tokyo, Japan
fDate :
9/1/2000 12:00:00 AM
Abstract :
Magnetic and noise characteristics of CoCrPt single-layer perpendicular recording media prepared by high-rate deposition process have been investigated. The medium noise was reduced by high-rate deposition, however the inter-diffusion between the CoCr19Pt 10 magnetic layer and a TiCr10 underlayer was observed at the interface. The magnetic properties were improved by introducing a CoCrRu underlayer between the CoCrPt and the TiCr layers. Addition of 2-nm-thick MgO layer between the CoCrRu and the TiCr layers was found to be useful to increase the coercivity and to reduce the medium noise
Keywords :
chemical interdiffusion; chromium alloys; cobalt alloys; coercive force; perpendicular magnetic recording; platinum alloys; CoCr19Pt10; CoCr19Pt10 magnetic layer; CoCrPt; CoCrPt single-layer perpendicular magnetic recording media; CoCrRu; CoCrRu underlayer; MgO; MgO layer; TiCr10; TiCr10 underlayer; coercivity; high-rate deposition process; inter-diffusion; low noise performance; magnetic characteristics; magnetic properties; medium noise; noise characteristics; Coercive force; Magnetic films; Magnetic heads; Magnetic materials; Magnetic noise; Magnetic properties; Magnetic recording; Noise reduction; Perpendicular magnetic recording; Sputtering;
Journal_Title :
Magnetics, IEEE Transactions on
