TbFeCo媒体を用いたレーザアシスト高密度磁気記録

概要

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Amorphous TbFeCo media are promising candidates for thermally assisted magnetic recording. We recently reported high-density laser-assisted magnetic recording of TbFeCo media with an Al underlayer. We have studied the relationship between the Al underlayer and the magnetic domain formation in such media. The Al underlayer, which has a nano-scale rugged structure, plays a significant role in inducing magnetic pinning sites, and increases the resolution of magnetic recording on TbFeCo magnetic media. We concluded that the exchange interaction is decreased locally and that a magnetic pinning site is formed at a location with a weak exchange interaction, where the magnetic boundary is stabilized by the weak interaction because of the suppression of the magnetic energy loss. Atomic-scale magnetic understanding of magnetic domain formation on amorphous TbFeCo media is necessary for the development of over 1-Tb/inch^2 high-density magnetic recording.
社団法人日本磁気学会の論文
2004-02-01