Atomistic spin-dynamics method UppASD
The UppASD software solves numerically the equation of motion of atomistic spins. This allows for a description of the magnetization dynamics on an atomic level.
The method is based on the analytical derivations of Ref. , and the first implementation of UppASD can be found in Ref. . Simulations up to one billion atoms can be made, and typical scientific problems addressed with this technique involve magnon excitations, skyrmion and soliton dynamics, ultrafast demagnetization, and magnonics. A review can be found in Ref.  and a text book describing this method is found in Ref. . Current developments involve a multiscale approach that couple the atomistic description to a continuum micro-magnetic description.
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- C. Etz, A. Bergman, L. Bergqvist, A. Taroni and O. Eriksson, ''Atomistic spin-dynamics and surface magnons'', J. Physics. Cond. Matter. 27 243202 (2015) (Topical Review).
- O. Eriksson, A. Bergman, L. Bergqvist, and J. Hellsvik, ''Ab-initio spin-dynamics; foundations and applications'' (Oxford university press – 2017).