Substantially two dimensional isotropic magnetic recording medium comprising a NiAl underlayer

摘要

A high areal density magnetic recording medium exhibiting high Hc, high SNR, high S* and substantially two dimensionally isotropic magnetic properties is achieved by depositing a NiAl underlayer on a NiP-plated non-magnetic metallic substrate, such as an Al alloy substrate. Embodiments include depositing a Cr layer on the NiAl underlayer. The NiAl underlayer and/or Cr layer can optionally contain an alloying element for inducing a preferred HCP crystallographic structure in the magnetic layer by lattice matching.