Nanostructured L10 Fe-Pt Based Thin Films for Perpendicular Magnetic Recording

Abstract

Aiming at development of ultra-high density magnetic recording media, nanostructured Fe-Pt perpendicular recording media were tailored. In order to obtain a crystal orientation of Fe-Pt(001) for a double- layered perpendicular medium with a soft-magnetic underlayer, a heteroepitaxial layer configuration was applied. A high pressure sputter- deposition method was effective for lowering the fct-ordering temperature of the L10 crystal structure. Microstructures of the media were constructed by two kinds of methods, i.e. inducing crystal defects and forming composite films with oxides. The highest SN ratio was obtained by a wall pinning type medium with the induced crystal defects. Design and possibility of the Fe-Pt(001) media were discussed.