Abstract
Media design of thermally assisted magnetic recording was simulated. Especially, data stability during cooling process after writing and that in the adjacent track in each time of rewriting was taken into consideration. Although the thermal stability factor of 120 is sufficient only for the stability of data at room temperature, that of 170-190 may be necessary for thermal gradient method (TG). The subject to realize TG is the magnetic anisotropy of an order of 10^7erg/cm^3 and the cooling rate of a few hundred K/ns. For field gradient method, it may be difficult to reduce the coercivity sufficiently by heating due to the stabilization of data during writing.
