High-Frequency Effects in Perpendicular Recording Media

概要

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We investigated switching speed effects in perpendicular media, using micromagnetic simulations. Hysteresis loop calculations show that for field sweep rates greater than 2 x 10^<13> Oe/s the measured coercivity increases sharply. The switching speed of individual grains was calculated as 18 ps to 38 ps, with a strong dependence upon the medium thickness and the magnetisation state of surrounding grains. A simulation of recording over a range of frequencies determined that writing of bits at data rates of up to 5 Gbit/s in media thicknesses of up to 180 Å is possible before loss of output occurs.
社団法人日本磁気学会の論文
2000-04-15