A hybrid model for media layer thermal management in heat assisted magnetic recording

In order to meet the requirements of ever increasing demand for higher memory capacities, heat assisted magnetic recording (HAMR) is quickly becoming one of the most promising technologies (Fig. 1). However, there are stringent operating requirements i of heating and cooling of the disk that occur within the order of nanoseconds to achieve the necessary data rates and to generate thermal gradients for sharp bit edge. After the information is recorded, the recorded data have to be thermally stable during cooling to ambient environment as well as the excess thermal energy stored in the disk should be dissipated efficiently to a sink.