Thermal effect on recording quality in heat-assisted recording

Heat-assisted magnetic recording is a promising approach to overcome the superparamagnetic limit, but the thermal effect will bring a lot of new issues in implementation of it. In this paper, the thermal effect on the recording mark and readout signal quality are investigated with heat-assisted magnetic recording (HAMR) platform experimentally. The differences of recorded marks and readout signals between heat-assisted recording and conventional recording are studied. It is also observed that after the saturation write current, the readout signal will decrease as the write current increases and laser power increases.