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

Volume

46

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1569

Lastpage

1571

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2009.2039118

Filename

5467482