The development of perpendicular recording, a proposed new paradigm for high density magnetic recording, will be assisted by intensive micromagnetic simulations. However, the simulation of perpendicular recording is itself very challenging, due to the requirement for a large simulation box, including both write head and disk, which must be treated at high spatial resolution and run for long times and for numerous data inputs. In order to accomplish this complex modeling, we have developed novel techniques, involving a mixed space/Fourier space representation, in which compute time scales linearly with system size enabling large simulations to be performed efficiently. We show tests of our methodology, and give an illustrative example of a simulation involving writing a tribit to disk.
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