A perpendicular magnetic recording medium having good perpendicular
magnetic anisotropy. The magnetic recording medium includes a tantalum
(Ta) seedlayer and a ruthenium (Ru) underlayer. The magnetic recording
layer can be fabricated from cobalt (Co) alloys. With the Ta seedlayer,
the perpendicular anisotropy and c-axis orientation of the magnetic
recording layer are greatly enhanced. Unity squareness is achievable as
is a negative nucleation field. The magnetic recording medium can be
formed by sputtering the various layers onto a substrate. Thus, a
perpendicular magnetic recording medium suitable for mass production is
provided.