Patent ID: 7842409

Claim:
An anti-ferromagnetically coupled (“AFC”) perpendicular magnetic recording medium, comprising: a ferromagnetic stabilization layer with perpendicular anisotropy; a non-magnetic spacer layer, wherein the non-magnetic spacer layer comprises Ru and an oxide selected from Si, Nb, Cr, W, Zr, or Ti; and a perpendicularly anisotropic main recording layer, wherein said ferromagnetic stabilization layer and said perpendicularly anisotropic main recording layer are anti-ferromagnetically coupled across said non-magnetic spacer layer, and each of the stabilization layer and the main recording layer comprise a ferromagnetic Co alloy, wherein the Co alloy comprises: at least one element selected from Cr, Pt, Ta, B, Mo, Ru, Si, Ge, Nb, Fe, Ni and W, and at least one oxide material selected from Al, Si, Ti, V, Mn, Co, Ni, Zn, Y, Zr, Nb, Mo, Hf and W.