Prospects of Hybrid Recording Materials

抄録

Thermally assisted or hybrid magnetic recording system is expected to be a data storage device with high areal density beyond 1 Tb/in². Several features of the hybrid recording are treated, such as high resolution recording capability by sharp thermal gradient, and pico-second order high-speed magnetization reversal. Since the hybrid recording solves the head field limit problem, the high magnetic anisotropy (K_u) materials with order of 10⁷ erg/cm³ are used for the hybrid recording media. We discuss the candidates of the high K_u materials, FePt and CoPt L1₀ ordered alloy, Tb-Fe-Co amorphous, and Co/Pd multilayer thin films.