Comparison of readout characteristics between magnetooptic transfer heads and magnetic heads

Author

Nomura, Tatsuo

Author_Institution

NHK Sci. & Tech. Res. Lab., Tokyo, Japan

Volume

25

Issue

6

fYear

1989

fDate

11/1/1989 12:00:00 AM

Firstpage

4474

Lastpage

4478

Abstract

The readout characteristics of a magnetooptic transfer (MOT) head were compared with those of a magnetic head. Magnetic recording/readout was done on a CrO₂ flexible disk by using a head with a track width of 5 μm. A Bi-substituted garnet film with a domain width of 1.2 μm and an He-Ne laser spot focused down to 3 μm were used as the MOT head. Readout waveforms from both heads were surprisingly similar. The maximum carrier-to-noise ratio obtained was 50 dB (bandwidth: 30 kHz) for both heads. Experimental data for off-track and crosstalk characteristics demonstrated that the MOT head was suitable for use as a high-track-density readout head. The potential advantages of multitrack readout using MOT heads are described

Keywords

crosstalk; magnetic heads; magnetic recording; magneto-optical recording; 30 kHz; CrO₂ flexible disc; GdGG substrate; GdGa5O12; He-Ne laser; MOT head; YSmLuBiCaFe5O12Ga5O12; YSmLuBiCaIGGG; carrier-to-noise ratio; crosstalk characteristics; domain width; garnet film; high-track-density readout head; magnetic head; magnetic recording; magnetooptic transfer heads; multitrack readout; readout characteristics; readout waveform; Bandwidth; Crosstalk; Disk recording; Ear; Garnet films; Magnetic domains; Magnetic heads; Magnetic recording; Magnetic separation; Magnetooptic recording;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.45328

Filename

45328