PtおよびAu下地層を使用したBaフェライト薄膜の作製  [in Japanese] Preparation of Ba Ferrite Films Using Pt and Au Underlayers  [in Japanese]

Ba ferrite films with excellent c-axis orientation were deposited on Au(111) and Pt(111) underlayers at substrate temperatures T_s higher than 500℃. C-axis orientation was also achieved by depositing the films at T_s in the range from 300℃ to 400℃ and then annealing in air. The specimen films exhibited low perpendicular coercivity in the range from 0.5 to 0.8kOe. The surface of as-deposited BaM/Au film looked rough, and the in-plane coercivity H_<c//> was high. For as-deposited BaM/Pt film, the average center-line roughness R_a was as small as about 1.7nm, and the perpendicular and in-plane coercivity were 2.5kOe and 0.3kOe, respectively. These results suggested that it might be possible to use BaM/Pt for a perpendicular magnetic recording layers.