Title :
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
fDate :
9/1/2000 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
