Title :
Magnetic domain expansion readout for an ultra high density MO recording
Author :
Awano, Hiroyuki ; Ohnuki, Satoru ; Shirai, Hiroshi ; Ohta, Norio ; Yamaguchi, Atushi ; Sumi, Satoshi ; Torazawa, Kenji
Author_Institution :
Eng. Res. Lab., Hitachi Maxell Ltd., Ibaraki, Japan
fDate :
9/1/1997 12:00:00 AM
Abstract :
An advanced readout technique using a dynamic domain expansion phenomenon has been proposed and investigated. Very small domains of 0.08 μm which achieve an areal density of 20 Gb/in2 (CD single side 30 GB with 680 nm laser) expand during readout, causing the readout signal to increase to the same level as for a 0.6 μm domain
Keywords :
magnetic domains; magneto-optical recording; 0.08 mum; 0.6 mum; 30 GB; 680 nm; CD single side; GdFeCo; TbFeCo; advanced readout technique; areal density; dynamic domain expansion phenomenon; magnetic domain expansion readout; ultra high density MO recording; very small domains; CD recording; Clocks; Magnetic domains; Magnetic fields; Magnetic recording; Magnetic separation; Optical pulse shaping; Saturation magnetization; Temperature; Testing;
Journal_Title :
Magnetics, IEEE Transactions on
