Heat Assisted Magnetic Recording Areal Density Dependence on Writer Current for Conventional and Shingled Magnetic Recording

Heat Assisted Magnetic Recording (HAMR) is the next-generation hard disk drive technology that enables continued and significant areal density growth. In this study, the dependence of writer current on HAMR areal density capacity (ADC) for Conventional Magnetic Recording (CMR) and Shingled Magnetic Recording (SMR) is compared experimentally on the spinstand. For each writer current measured, laser current was optimized for ADC for CMR and SMR. We observed for both HAMR CMR and SMR, ADC saturated with increasing writer current.