Abstract
Abstract Multi-scale spin dynamics of systems of nanomagnets is investigated by numerical simulation using parallel algorithms. A FORTRAN program was developed using an application programming interface OpenMP. The parallel code provides following areas of research: study of the possibility of regulation time of switching of magnetization of the nanostructure; study of the role of nanocrystal geometry of coherent relaxation of 1-, 2- and 3-dimensional objects; study of magnetodynamics of spin system coupled with the passive resonator (radiation damping (RD)); application of RD to ultra-fast relaxation in an assembly of single-domain ferromagnetic particles; study of the role of long distant dipole–dipole fields as the origin of the extremely random behavior in hyperpolarized NMR maser, etc. Estimates of speedup and efficiency of implemented algorithms in comparison with sequential algorithms have been obtained. It is shown that the use of supercomputing technology for study of spin dynamics provides simulation power for spin systems which include thousands of magnetic voxels.
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