Improved patterned media for probe-based HAMR

In this work, a novel concept of patterned media well suited for probe-based heat assisted magnetic recording (HAMR) is presented. This approach is based on the simultaneous use of low thermal conductivity nanoporous silicon and patterned media, the latter allowing both ultra-high storage densities and a quasi perfect lateral (e.g. inter bits) thermal insulation. A model is constructed in which it is based on the classical heat transfer equations and the use of effective thermal conductivity. The contact and non-contact modes between a patterned media and a heated probe are also studied. Hysteresis loops for the Pt/Co/Pt multilayer deposited on patterned silicon is found to be square shaped and the coercive field is only slightly different from that of the same layer deposited on regular silicon.