Thermal decomposition and desorption of PFPE Zdol on a DLC substrate using quartic bond interaction potential

Abstract

In heat assisted magnetic recording (HAMR) system, heating of the hard disk magnetic layer is carried out by applying laser rays during the movement of the read/write head over the carbon overcoat for the purpose of reading and writing on its magnetic layer. Depletion of PFPE Zdol occurs because of thermal decomposition and desorption on a DLC substrate due to laser heating and this model is developed using the coarse-grained bead spring based on quartic and van der Waals interaction potential. The effects of temperature on the bond breaking phenomenon of PFPE Zdol due to thermal decomposition and thermal desorption were studied. To support the reliability of the present simulation results by a quartic potential, the end bead density and total bead density on a DLC substrate obtained by the finitely extensible non-linear elastic (FENE) and quartic potential are shown in a comparative manner.