Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4967249 | Journal of Computational Physics | 2017 | 11 Pages |
Abstract
A practical and efficient scheme for the higher order integration of the Landau-Lifschitz-Gilbert (LLG) equation is presented. The method is based on extrapolation of the two-step explicit midpoint rule and incorporates adaptive time step and order selection. We make use of a piecewise time-linear stray field approximation to reduce the necessary work per time step. The approximation to the interpolated operator is embedded into the extrapolation process to keep in step with the hierarchic order structure of the scheme. We verify the approach by means of numerical experiments on a standardized NIST problem and compare with a higher order embedded Runge-Kutta formula. The efficiency of the presented approach increases when the stray field computation takes a larger portion of the costs for the effective field evaluation.
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Physical Sciences and Engineering
Computer Science
Computer Science Applications
Authors
Lukas Exl, Norbert J. Mauser, Thomas Schrefl, Dieter Suess,