Abstract
Co-γFe2O3perpendicular magnetic recording media were preparedby the CoO-Fe3O4single-1ayer deposition method, which is more suitable for mass production than the CoO/ Fe3O4 multilayer deposition method. Moderately <100>-oriented Co-γFe2O3media with intermediate perpendicular anisotropy (Ku=6.0 × 105erg/cm3) were prepared with a wide range of film thicknesses and oxygen partial pressure used in deposition of NiO underlayers. These media showed a superior high-density recording performance comparable to that of highly <100>-oriented Co-γFe2O3 media with large perpendicular anisotropy (Ku=1.4 × 106 erg/cm3). It is surmised that the superior performance of these media was supported by the longitudinal magnetic component as well as the perpendicular one.
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