3 research outputs found
Stochastic dynamic simulations of fast remagnetization processes: recent advances and applications
Numerical simulations of fast remagnetization processes using the stochastic
dynamics are widely used to study various magnetic systems. In this paper we
first address several crucial methodological problems of such simulations: (i)
the influence of the finite-element discretization on the simulated dynamics,
(ii) choice between Ito and Stratonovich stochastic calculi by the solution of
micromagnetic stochastic equations of motion and (iii) non-trivial correlation
properties of the random (thermal) field. Next we discuss several examples to
demonstrate the great potential of the Langevin dynamics for studying fast
remagnetization processes in technically relevant applications: we present
numerical analysis of equilibrium magnon spectra in patterned structures, study
thermal noise effects on the magnetization dynamics of nanoelements in pulsed
fields and show some results for a remagnetization dynamics induced by a
spin-polarized current.Comment: Invited paper submittedto JEMS'04 (Dresden, Germany