FePt-Based HAMR Media With a Function Layer for Better Thermal Control

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A function layer with temperature-dependent electrical/thermal conductivity has been integrated into the FePt-based heat-assisted magnetic recording (HAMR) media layout. The Cu2O function layer enables a better thermal control of the HAMR media to use a moderate laser power to heat up the recording media with minimized side effects regarding to the achievable thermal gradient and thermal spot size. The inserted Cu2O layer also solved the surface morphology issue for the HAMR media design using the Cu-based heat sink layer (decomposed from the copper nitride). The developed Cu2O function layer could be applied for a real HAMR application.