Abstract
We found that overwrite could be improved in synthetic ferrimagnetic media (SFM) where the stabilizing layer has an anisotropy field with a higher value than that of the recording layer by a simple analysis of transition shift. An exchange field acting on the recording layer facilitates the reversal of the magnetization of the recording layer, because the higher anisotropy field of the stabilizing layer has the effect of reversing the magnetization in the recording layer earlier than that in the stabilizing layer. In an experiment, we not only found an improvement in overwrite characteristics, but also excellent thermal robustness in areas where a stabilizing layer with higher anisotropy was employed.
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