Abstract
Thermomagnetic recording process was simulated using Huth’s model for the magnetic field modulation (MFM) recording on a TbFeCo medium. This study focused on the effects of introduction of a field gradient layer, reduction of the laser spot size, and application of laser pulsed MFM method. By using GdFeCo layer, field gradient of 3.7 Oe/nm was confirmed to be applied in the recording layer. This field gradient contributes to the decrease of recorded mark elongation and the suppression of the collapse of the marks, which are two major problems to record marks smaller than 100 nm. For the reduction of the laser spot size, the mark elongation was confirmed to decrease, however the improvement of the stability of small sized marks was insufficient. By applying laser pulsed MFM method, the simulation showed the improvement of recording characteristic of small sized marks.
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