High density recording on magnetically induced super resolution disk with magnetic field modulation and pulsed laser irradiation

The magnetically induced super resolution disk with an in-plane magnetized layer (CAD-MSR) is one of the most useful candidates for high density recording because of its simple structure and no initializing fields. This paper describes an evaluation of a CAD-MSR disk using magnetic field modulation with a pulsed laser, which is also useful for high density recording. We obtained a jitter of less than 10% at a bit density of 0.3 /spl mu/m/bit (2 T=0.4 /spl mu/m in (1,7) RLL code). The real density corresponds to an unformatted capacity of more than 5 Gbytes on a /spl phi/ 120 mm disk.