RECENT PROGRESS IN MAGNETICALLY INDUCED SUPERRESOLUTION

Abstract

  Progress in Magnetically induced SuperResolution since first reported in 1991 is reviewed. Recording on the disk by front aperture detection (FAD) was achieved for a bit length of 0.27 μm both by light intensity modulation and by magnetic field modulation. Since rear aperture detection (RAD) has the advantage of reducing crosstalk, the RAD type has the promise of realizing the huge capacity MO disk. RAD by a small initializing field and RAD by magneto-static coupling are expected to allow track pitches as narrow as 0.7 μm and bit lengths the same as achieved by FAD.