20 nm domain expansion readout by magnetic amplifying MO system (MAMMOS)

Author

Awano, Hiroyuki ; Imai, Susumu ; Sekine, Masaki ; Tani, Manabu ; Ohta, Norio ; Mitani, Ken-ichiro ; Takagi, Nobuyuki ; Noguchi, Hitoshi ; Kume, Minoru

Author_Institution

Tsukuba Res. Lab., Hitachi Maxell Ltd., Ibaraki, Japan

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

2261

Lastpage

2265

Abstract

Very small domains are recorded on the MAMMOS disk and they ran be detected using RF readout field. The MO signal amplitude of 20 nm domains can be enhanced to the saturated signal level. For these small domains, the thermal stability problem is investigated. Even if high laser power for readout is irradiated to the small domains, the reproduced signal was maintained. The result indicates that the recording layer of TbFeCo possesses an advantage for paramagnetic limit problem over 100 Gbits/in²

Keywords

magnetic domain walls; magneto-optical recording; thermal stability; 20 nm; MAMMOS disk; RF readout field; TbFeCo; domain expansion readout; high-density recording; magnetic amplifying magneto-optical system; paramagnetic limit problem; saturated signal level; thermal stability problem; very small domains; Amorphous magnetic materials; Disk recording; Magnetic domains; Magnetic recording; Magnetic separation; Optical recording; Optical saturation; Perpendicular magnetic recording; Saturation magnetization; Thermal stability;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908387

Filename

908387