HIGH-EFFICIENCY COMPUTING SYSTEMS

Use of supercomputer to solve problems of magnetodynamics and of coherent processes in magnetic nano-structures

A. G. Demenev, T. C. Belozerova, P. V. Kharebov, V. K. Henner, E. K. Khenner

Perm State National Research University

Abstract: Multi-scale molecular dynamics of systems of nanomagnets is investigated by numerical simulation with parallel algorithms using. The parallel version of the modeling Fortran program was created using an application programming interface OpenMP. Created parallel code provides the next types of research: study of the possibility of regulation time of switching of the magnetic moment of the nanostructure; estimation of the role of nanocrystal geometry on the super-radiation of 1-, 2- and 3-dimensional objects; study of magnetodynamics of a nanodots inductively coupled with the passive resonator; depending on the solution from initial orientation of the magnetic moment in order to find the configurations for which the super-radiance and radiative damping are maximal. The estimates of speedup and efficiency of implemented algorithms in comparison with direct algorithms have been obtained. It is shown that the use of supercomputing technology for problems of spin dynamics allows to provide simulations for spin systems which include thousands of magnetic nanoparticles.

Keywords: high-performance computing, parallel algorithms, mathematical modeling, coherent effects, magnetic nano-structures.