Abstract
The granular hcp Co3Pt nano-grains with large perpendicular coercivity (Hcperp) of 3800 Oe and high perpendicular squareness (Sperp) of 0.93 can be achieved by deposited 14 nm thickness of Co3Pt magnetic layer onto the Pt underlayer with thickness of 200 nm and annealing at low temperature of 300degC in a vacuum of 1 mTorr. It is found that the oxygen atoms would diffuse into Co3Pt layer through inter-grains to isolate Co3Pt grains and prevent grain growth that will decrease inter-grains interaction and enhance recording density of the magnetic film. This film revealed its prominent potential to be applied as perpendicular magnetic recording media for ultra high-density recording.
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