Title :
Spatial resolution of domain copying in a magnetic domain expansion readout disk
Author :
Blom, P.W.M. ; Horikx, J.J.L. ; Bloemen, P.J.H. ; Verschuren, C.A. ; van Kesteren, H.W. ; Awano, H. ; Ohta, N.
Author_Institution :
Philips Res. Lab., Eindhoven, Netherlands
fDate :
9/1/2001 12:00:00 AM
Abstract :
In a magnetic amplifying magnetooptical system (MAMMOS) disk, the copying process of a magnetic domain from the recording layer into the readout layer is investigated by using a laser spot diameter of 0.66 μm. Interference between neighboring bits occurs when the spatial resolution of the copy process is larger than half the domain size. It is observed that a reduction of the readout power from 2.3 to 2.0 mW corresponds to a decrease of the copy window from 0.5 to 0.06 μm. As a result, at 2.0 mW packed magnetic domains with a width of only 0.11 μm have been resolved without interference by using domain expansion
Keywords :
magnetic domains; magneto-optical recording; 2.0 mW; MAMMOS; domain copying; laser spot diameter; magnetic amplifying magneto-optical system; magnetic domain expansion readout disk; spatial resolution; Apertures; Disk recording; Magnetic domain walls; Magnetic domains; Magnetooptic recording; Magnetostatics; Optical modulation; Optical recording; Signal resolution; Spatial resolution;
Journal_Title :
Magnetics, IEEE Transactions on
