Patent ID: 8580409
Filing Date: 2013-11-12
Classification: G11B,Y10T

Abstract:
1. A perpendicular magnetic recording medium, comprising: a soft underlayer; an underlayer on the soft underlayer; a first onset layer formed on and in contact with the underlayer, wherein the first onset layer comprises a Hexagonal Close Packed (HCP) Ru oxide having a first magnetic moment; a second onset layer formed on and in contact with the first onset layer, wherein the second onset layer comprises a HCP magnetic oxide having a second magnetic moment; and a perpendicular magnetic recording layer comprising Co-oxide formed on and in contact with the second onset layer, wherein the perpendicular magnetic recording layer has an easy axis of magnetization that is substantially perpendicular to a substrate of the recording medium, and wherein the second magnetic moment is higher than both the first magnetic moment and a magnetic moment of the perpendicular magnetic recording layer.