IMPROVED SPIN DYNAMICS SIMULATIONS OF MAGNETIC EXCITATIONS

D. P. Landau (), Shan-Ho Tsai, M. Krech and Alex Bunker
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D. P. Landau: Center for Simulational Physics, The University of Georgia, Athens, GA 30602, U.S.A.
Shan-Ho Tsai: Center for Simulational Physics, The University of Georgia, Athens, GA 30602, U.S.A.
M. Krech: Center for Simulational Physics, The University of Georgia, Athens, GA 30602, U.S.A.
Alex Bunker: Center for Simulational Physics, The University of Georgia, Athens, GA 30602, U.S.A.

International Journal of Modern Physics C (IJMPC), 1999, vol. 10, issue 08, 1541-1551

Abstract: Using Suzuki–Trotter decompositions of exponential operators we describe new algorithms for the numerical integration of the equations of motion for classical spin systems. These techniques conserve spin length exactly and, in special cases, also conserve the energy and maintain time reversibility. We investigate integration schemes of up to eighth order and show that these new algorithms can be used with much larger time steps than a well established predictor–corrector method. These methods may lead to a substantial speedup of spin dynamics simulations, however, the choice of which order method to use is not always straightforward.

Keywords: Spin systems; Spin dynamics simulations; Equations of motion (search for similar items in EconPapers)
Date: 1999
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DOI: 10.1142/S0129183199001327

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