Hybrid finite element and fast Fourier on multipoles algorithm for micromagnetic modeling of perpendicular SOMA media

A 3D finite element micromagnetic model is used to simulate the switch dynamics of Self-Organized Magnetic Array (SOMA) recording system. The influence of media grain properties such as anisotropy field distribution is investigated. Our studies also include the signal to noise ratio (SNR) with respect to different bit-array alignments. The fluctuations of signal and noise are investigated under the condition that the transition location is shifted in a square assembled array.