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FastMag Micromagnetic Framework : Current State and Roadmap

Micromagnetic solvers have a significant predictive power and are important for our ability to analyze and design magnetic devices and systems. However, micromagnetic analysis of complex and large-scale devices may be very time consuming or impossible. The computational complexity is due to the geometrical and material complexity of many structures, a large number of required discretization elements, and the numerical difficulties associated with the time integration. One example of a highly complex structure for simulations is a magnetic write head, which may have size of several tens of microns and require a mesh resolution of 5-10 nm to fully resolve all dynamic processes. More examples include a large array of Magnetic Random Access Memory elements, granular media, bit patterned media, magnonic crystals, etc. Such systems may have a large size, fine features, and highly nonuniform domains, which are required to be discretized on a fine scale. Realistic modeling of such structures can be very complex.