Patent ID: 8101292

Claim:
A perpendicular magnetic recording medium comprising a substrate and a magnetic recording layer on the substrate, wherein the magnetic recording layer has the following layered structure: ML i1 /AuAgML j1 /ML i2 /AuAgML j2 /ML i3 wherein i1, i2, i3, j1, j2 =1 to 10, and wherein the ML layers are non Au or Ag-containing magnetic layers that comprise Co, Cr, Pt and B; and the AuAgML layers comprise Co, greater than 0 at % but less than or equal to 30 at % Pt, greater than 0 at % but less than or equal to 10 at % B, greater than 0 at % but less than 30 at % Cr, and greater than 0 at % but less than or equal to 8 at % of at least one of Ag and Au.