A novel flying magnetic readout head based on magneto-optic transfer

Author

Terada, T. ; Nomura, T. ; Tsuchiya, R. ; Honda, K. ; Tomita, M. ; Furuoya, T. ; Kakezawa, T. ; Kato, S.

Author_Institution

R&D Center, Minebea Co. Ltd., Shizuoka, Japan

Volume

34

Issue

4

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

2006

Lastpage

2008

Abstract

We have developed a novel flying magnetic readout Lead based on the concept of magneto-optical transfer. A special feature of this head is that its slider is made of a GGG substrate itself. To improve the readout characteristic of this head, the optical system was adjusted and the grooves were formed on a magnetic garnet film. The readout waveform and signal envelope became stable and the maximum CNR obtained was 52 dB (RBW=30 kHz). The CNR was almost constant for the recorded track width from 80 μm to 2.7 μm

Keywords

hard discs; magnetic heads; magnetic recording noise; magneto-optical recording; 30 kHz; 52 dB; 80 to 2.7 micron; GdGG; GdGa5O12; flying magnetic readout head; focus servo gain; garnet slider; magnetic garnet film; magnetic hard disk; magneto-optic transfer; maximum CNR; readout characteristic; readout waveform; recorded track width; signal envelope; Garnet films; Hard disks; Magnetic domains; Magnetic films; Magnetic heads; Magnetooptic effects; Optical films; Optical surface waves; Saturation magnetization; Substrates;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.706772

Filename

706772