Influence of space discretization size in 3D micromagnetic modeling

To improve the magnetic properties of ferromagnetic materials, one needs to qualify relations between the microscopic material properties and the macroscopic magnetic behavior. Large computer resources nowadays should make it possible to do this using micromagnetic simulations for larger, bulk like samples. Here, the size of the sample is limited by computer resource restrictions on the number of spatial discretizations in the sample. Generally, the exchange length is seen as the maximum discretization size in micromagnetic computations. This paper shows that in the research area where relations between microstructure and macroscopic magnetic behavior are investigated, larger discretization sizes can be used. This is demonstrated using a micromagnetic hysteresis model.