Patent ID: 7833640

Claim:
A perpendicular recording media comprising: a magnetic recording layer; a soft under layer; and, an intermediate layer structure disposed between said magnetic recording layer and said soft under layer, further comprising a first nucleation layer formed over and in contact with said soft under layer, said first nucleation layer comprising a binary Ni alloy of the form Ni-M, M being chosen from the group consisting of Fe, Mn, Co, V, W, and Cu, said first nucleation layer having a thickness between 0.1 nm and 6 nm, a second nucleation layer formed over and in contact with said first nucleation layer, said second nucleation layer comprising a Ni alloy including at least two other elements, said second nucleation layer having a thickness between 0.1 nm and 6 nm, and an hcp under layer formed over and in contact with said second nucleation layer, said hcp under layer comprising a Ru alloy.