Title :
Observation of magnetic interaction between the soft magnetic and the recording layers in double-layer perpendicular media
Author :
Honda, Yukio ; Tanahashi, Kiwamu ; Hirayama, Yoshiyuki ; Kikukawa, Atsushi ; Futamoto, Masaaki
Author_Institution :
Central Res. Lab., Hitachi Ltd., Tokyo, Japan
fDate :
7/1/2001 12:00:00 AM
Abstract :
Magnetic force microscopy was used to study the magnetic interaction in double-layer perpendicular media between the CoCrPt recording layer and the CoTaZr soft magnetic layer by observing the magnetization structure from the soft magnetic layer side. A strong magnetic interaction between the two layers was observed when the layers were in direct contact. Introducing a thin nonmagnetic layer between the two magnetic layers reduced the magnetic interaction and resulted in the reduction of the media noise of double-layer perpendicular media
Keywords :
chromium alloys; cobalt alloys; magnetic force microscopy; magnetic recording noise; magnetisation; perpendicular magnetic recording; platinum alloys; soft magnetic materials; CoCrPt recording layer; CoCrPt-CoTaZr; CoTaZr soft magnetic layer; double-layer perpendicular medium; magnetic force microscopy; magnetic interaction; magnetization; noise; nonmagnetic layer; Magnetic domain walls; Magnetic domains; Magnetic flux; Magnetic force microscopy; Magnetic noise; Magnetic recording; Perpendicular magnetic recording; Saturation magnetization; Soft magnetic materials; Transmission electron microscopy;
Journal_Title :
Magnetics, IEEE Transactions on
