Ti下地,Tiキャップ層を用いたCoCr系ポストアニール媒体における磁性結晶粒の磁気的孤立化(磁気記録)

概要

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To combine "maintenance of thermal stability" and "magnetic isolation among magnetic grains" for CoCr-based perpendicular media, we focus attention on the post-annealing process. Signfficant improvement of the magnetic properties is confirmed for the post-annealed media utilizing titanium as both cap- and under-layers. In consequence it was found that a remarkable large coercivity of 9.1 kOe and squareness of 1 are realized for Ti/Co_<68>Cr_<16>Pt_<16>/Ti post-annealed media; a non-ferromagnetic TiCoPt layer with B2 type structure is formed between the Ti and CoCrPt layers by post-annealing; and a remarkable improvement of the magnetic properties is caused by both magnetic isolation among magnetic grains and elimination of the nanocrystalline initial layer, which behaves like a soft magnetic layer.
社団法人日本磁気学会の論文
2004-03-01