| 摘要 |
PURPOSE:To provide the higher coercive force to a magnetic recording medium of a thin film type with which iron nitride is utilized by forming said medium of the thin film in which ferromagnetic iron nitride and nonmagnetic iron nitride co-exist. CONSTITUTION:The thin film in which the ferromagnetic iron nitride and nonmagnetic iron nitride co-exist is formed as the magnetic layer. The magnetical interaction of the ferromagnetic iron nitride with each other is thereby weakened and further the shape anisotropy is provided, by which the high coercive force is generated. Since the iron nitrides are used, the formation of the co-existing films is easy and stable. The ferromagnetic iron nitride includes alpha''-iron nitride, gamma'-iron nitride and epsilon-iron nitride of which the gamma'-iron nitride and epsilon-iron nitride can be relatively easily and stably formed. The nonmagnetic iron nitride includes part of zeta-iron nitride and epsilon-iron nitride, of which the zeta-iron nitride is easier to use.
|
