Title :
Improved Grain Isolation in [Co/Pd]n Multilayer Media for Thermally Assisted Magnetic Recording
Author :
Hirotsune, Akemi ; Nemoto, Hiroaki ; Takekuma, Ikuko ; Nakamura, Kimio ; Ichihara, Takayuki ; Stipe, Barry C.
Author_Institution :
Central Res. Lab., Hitachi, Ltd., Odawara, Japan
fDate :
6/1/2010 12:00:00 AM
Abstract :
The effect of the magnetic and structural properties on recording performance was investigated. Well grain-isolated media were obtained by adding boron and oxygen into the [Co/Pd]n multilayer and cooling the substrate. We found that the recorded bit size could be decreased by reducing the magnetic cluster size. Twenty-flve-nm bits were successfully recorded on the improved media with a magnetic cluster size of about 30 nm.
Keywords :
cobalt alloys; crystal microstructure; magnetic cooling; magnetic multilayers; palladium alloys; thermomagnetic recording; [Co-Pd]n; bit size; boron addition; grain isolation; magnetic cluster size; magnetic properties; multilayer media; oxygen addition; recording performance; structural properties; substrate cooling; thermally assisted magnetic recording; well grain-isolated media; Boron; Heat-assisted magnetic recording; Magnetic anisotropy; Magnetic films; Magnetic multilayers; Magnetic properties; Magnetic recording; Optical recording; Perpendicular magnetic anisotropy; Sputtering; $[{rm Co/Pd}]_{rm n}$ multilayer; grain isolation; magnetic cluster size; thermally assisted magnetic recording;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2009.2039118
