Atomistic simulations on the effects of grain size in HAMR

Using atomistic models, L1
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FePt systems were modeled undergoing heat-assisted magnetic recording (HAMR), while varying grain diameter and height. To investigate properties relevant to the application of FePt in HAMR, atomistic simulations were done to calculate temperature dependent anisotropy scaling, Curie temperature, magnetic switching profiles for grain diameters ranging from 3nm to 12nm, and grain heights ranging from 5nm to 10nm. The results section highlights some key findings in the magnetic switching data obtained, alongside a holistic comparison of various HAMR recording tracks which have undergone a writing process.