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Improved Spin Dynamics Simulations Of Magnetic Excitations

Author

Listed:
  • 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.)

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.

Suggested Citation

  • D. P. Landau & Shan-Ho Tsai & M. Krech & Alex Bunker, 1999. "Improved Spin Dynamics Simulations Of Magnetic Excitations," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 10(08), pages 1541-1551.
    • Handle: RePEc:wsi:ijmpcx:v:10:y:1999:i:08:n:s0129183199001327
    DOI: 10.1142/S0129183199001327
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