Abstract
The effect of thermal fluctuation and inter-granular exchange coupling on longitudinal and perpendicular magnetic recording media is investigated by computer simulation. It is found from the calculation of magnetic characteristics that the change in Hc due to thermal fluctuation can be suppressed by inter-granular exchange interaction in perpendicular recording media, but it can not be suppressed in longitudinal recording media. It is found from the calculation of read/write characteristics that magnetization states recorded in longitudinal recording media are affected by thermal fluctuation sooner with the increase in the inter-granular exchange coupling, while the magnetization states recorded in perpendicular recording media is found to become less sensitive to thermal effect when the inter-granular exchange coupling is increased.
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