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25 April 2024

» arxiv » 0807.2387

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Fast computation of magnetostatic fields by Non-uniform Fast Fourier Transforms
Evaggelos Kritsikis ; Jean-Christophe Toussaint ; Olivier Fruchart ;
Date:	15 Jul 2008
Abstract:	The bottleneck of micromagnetic simulations is the computation of the long-ranged magnetostatic fields. This can be tackled on regular N-node grids with Fast Fourier Transforms in time N logN, whereas the geometrically more versatile finite element methods (FEM) are bounded to N^4/3 in the best case. We report the implementation of a Non-uniform Fast Fourier Transform algorithm which brings a N logN convergence to FEM, with no loss of accuracy in the results.
Source:	arXiv, 0807.2387
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