抄録
Reduction of the thickness of the initial film-growth layer of CoCrPt-based perpendicular recording media was investigated using TiCr, CoCr, and Ru seed layers. Magnetic analysis revealed that the initial layer has small perpendicular magnetic anisotropy Ku, and that the thickness of the initial layer was about 10-15 nm with a TiCr seed layer, and 1-6 nm with a CoCr or a Ru seed layer. X-ray diffraction patterns and TEM images indicated that the initial layer contains an fcc-like structure, and that many stacking faults exist in CoCrPt-based perpendicular films, even with a CoCr or a Ru seed layer, The improvement in epitaxial film growth obtained by using a CoCr or a Ru seed layer is very effective in reducing the thickness of the initial layer, while is found to prevent the segregation of Cr from Co, resulting in larger intergranular exchange coupling.
