Figure of merit in MO readout with polar and transverse Kerr effects

Author

Kokogawa, Tomohiro ; Numata, Takuhisa ; Inokuchi, Seiji

Author_Institution

Fac. of Eng. Sci., Osaka Univ., Japan

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

3808

Lastpage

3810

Abstract

Readout in magnetooptical (MO) disk is discussed. MO signals obtained with transverse, longitudinal and polar Kerr effects are proposed from the viewpoint of the figure of merit of readout. The comparison was done in materials with or without perpendicular magnetization, and included the dependencies on the incident angle of the beam. Although the incident angle must be large, PtMnSb gives larger figure of merit in transverse Kerr readout than TbFeCo in polar Kerr readout at a wavelength of 415 nm

Keywords

Kerr magneto-optical effect; antimony alloys; cobalt alloys; iron alloys; magnetisation; magneto-optical recording; manganese alloys; platinum alloys; terbium alloys; 415 nm; MO readout; MO signals; PtMnSb; TbFeCo; figure of merit; magnetooptical disc; perpendicular magnetization; polar Kerr effects; polar Kerr readout; recording density; transverse Kerr effects; transverse Kerr readout; Fluctuations; Kerr effect; Magnetic materials; Magnetization; Magneto electrical resistivity imaging technique; Magnetooptic effects; Optical films; Optical polarization; Reflectivity; Signal to noise ratio;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281307

Filename

281307