低温測定による磁気記録媒体の磁気的不均一性の検出

抄録

The intrinsic magnetic non-uniformity of magnetic recording media, which disappears at room temperature on account of thermal effects, can be detected by low-temperature measurement. The temperature dependence of the coercivity squareness ‘S*’ was investigated and could be explained by the distributions of the dynamic coercivity and the activation volume. In considering the high-speed writing process on magnetic disks, where the dynamic magnetic properties should correspond to the write performance, it is informative to investigate the magnetic properties of the media in order to avoid thermal effects at low temperature.