MAMMOS Readout with Magnetic Field Modulation

N. Takagi; K. Mitani; H. Awano; K. Shimazaki; N. Ohta

doi:10.3379/jmsjmag.23.S1_161

Signal Enhancement using Domain Expansion

MAMMOS Readout with Magnetic Field Modulation

N. Takagi, K. Mitani, H. Awano, K. Shimazaki, N. Ohta

Author information

Keywords: magneto-optical disk, magnetic amplifying, MAMMOS, MFM, high density recording, error rate

JOURNAL OPEN ACCESS

1999 Volume 23 Issue S_1_MORIS_99 Pages S1_161-164

DOI https://doi.org/10.3379/jmsjmag.23.S1_161

Details

Abstract

MAMMOS (Magnetic AMplifying Magneto-Optical System) is one of the highest density readout methods for storage media. The signal is directly amplified on the medium and its amplitude is just the same as that from a long domain. Even at a 0.04 μm domain, the signal was large enough. At a 0.2 μm packed domain, CNR was more than 50 dB and BER was in the 10^-4 range. By employing a MAMMOS readout with magnetic field modulation (MFM-MAMMOS), the signals have both very high resolution and large amplitude characteristics.

Corresponding author

Register with J-STAGE for free!