High density recording media with CrMoB underlayer

In this paper, we reports the media characteristics with CrMoB UL and the performance improvements compared with CrMo UL. Media with CrMoB UL has about 300 Oe lower remanent coercivity (H/sub er/) and about 0.4 dB higher isolated signal-to-noise ratio (S/sub o//N/sub m/). It can be concluded that CrMoB has better performance than CrMo as media UL.