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

A function layer with temperature-dependent electrical/thermal conductivity has been integrated into the FePt-based heat-assisted magnetic recording (HAMR) media layout. The Cu 2 O 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 Cu 2 O 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 Cu 2 O function layer could be applied for a real HAMR application.