Abstract
Accurate servo-signal, good recording characteristics and sufficient signal-to-noise ratio are revealed to be necessary conditions for the optimum design of magneto-optical (MO) disks. These condi-tions are dependent on the characteristics of the disk drive. This paper focuses on digital MO disks with a diameter of 130 mm which conform to the ISO standard. E-polarized incident light where the elec-tric vector is parallel to the grooves is suitable for obtaining a stable servo signal and H-polarized light where the magnetic vector is parallel to the grooves is suitable for a sufficient cross-track signal. Furthermore, a quadrilayer structure is desirable for the improvement of recording sensitivity and enhancement of the Kerr rotation.
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