シンセティックフェリ磁性媒体

概要

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The thermal stability and read-write performance of longitudinal magnetic recording media with antiferromagnetically coupled layers were investigated. The thermal stability is strongly dependent on the interaction between layers and the anisotropy energy of the stabilizing layer or layers. For media with two coupled layers, the energy barrier is increased by 30% to 80% of the anisotropy energy of the stabilizing layer, depending on the strength of the interaction. Although the total thickness is larger than that of a conventional medium with the same remanence magnetization and thickness product M_rδ, the resolution is higher and depends on the difference in thickness between the layers. With these "synthetic ferrimagnetic" structures, it is possible to create thermally stable, low-M_rδ and high-resolution media with areal densities beyond 100 Gb/in^2.
社団法人日本磁気学会の論文
2003-01-01