Ferromagnetic films etched with a periodic array of holes (antidots) may be used as high-
density storage media, where memory bits are stabilized by shape fields H s near the edges
of the antidots. A micromagnetic simulation is performed to study the conditions for well-
defined bits at remanent state. The parameter under consideration is the bit signal-to-noise
ratio (SNR), which is defined wrt the ideal magnetization alignment, and is calculated for
different values of intrinsic anisotropy K u and transverse applied field H y. Unlike previously …