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

Volume

37

Issue

5

fYear

2001

fDate

9/1/2001 12:00:00 AM

Firstpage

3860

Lastpage

3864

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.952758

Filename

952758