Co_<0.9>Fe_<0.1>-AlO_xNOL中への強磁性メタルナノコンタクトの形成に関する研究(磁気記録)

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We tried to fabricate pure Co_<0.9>Fe_<0.1> ferromagnetic metal nano-contacts in the insulator layer of AlO_x. First, we verified the effect of natural oxidation (N.O.) and in-situ annealing process, and we clarified title formation mechanism of Co_<0.9>Fe_<0.1>-AlO_x NOL. In N.O. process, Al is migrated from Co_<0.9>Fe_<0.1>/Al mixing layer (as deposition state) and cohered on the surface by oxygen. As the result, Co_<0.9>Fe_<0.1> path is pure. By in-situ annealing, Al near the surface migrate to the Co_<0.9>Fe_<0.1>/Al mixing surface by residual oxygen in the ultrahigh vacuum chamber, and the other Al diffuse to Co_<0.9>Fe_<0.1> at the same time. Next, we observed the surface of Co_<0.9>Fe_<0.1>-AlO_x NOL by in-situ conductive AFM (c-AFM). We confirmed the metal paths in an area with a diameter of about 1 nm.
社団法人日本磁気学会の論文
2008-05-01