Abstract
Shingled recording employing bit-patterned media when used in conjunction with heat-assisted magnetic recording can significantly enhance the recording density. This paper investigates writing of dots that are not directly under the laser pulse. Such a shifted scheme of writing allows higher densities when used with shingled recording. A further increase in the recording density can be obtained by using composite structures, comprising a superparamagnetic writing layer, and a (doped) FePt storage layer. Effect of head velocity, Curie temperature variation, track mis-registration, and dot position jitter on the standard deviation of switching distribution is studied to evaluate the designs that offer data densities as high as ~16 Tbpsi.
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