IMPROVEMENT OF OUTPUT VOLTAGE OF SINGLE LAYERED Co-Cr MEDIA USING RING HEADS

抄録

  The purpose of this study is to increase output voltages at high recording density ( specifically at 150kFRPI ) of single layered Co-Cr media by investigating their dependence on film structures and magnetic properties. The output voltages at 13 kFRPI and 150 kFRPI were measured as a function of perpendicular coercivity (Hc_⊥) film thickness(δ) and saturation magnetization(Ms). Among those parameters, we found Ms to be the most crucial factor. To increase output voltages of single layerd Co-Cr media using a ring head, it is effective to make media with the largest Ms value as long as incoherent rotation gets dominant in the film.