SPIN DYNAMICS SIMULATIONS OF CLASSICAL, THREE-DIMENSIONAL HEISENBERG MAGNETS

D. P. Landau, Alex Bunker and Kun Chen
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D. P. Landau: Center for Simulational Physics, U. of Georgia, Athens, Georgia 30602, Georgia
Alex Bunker: Center for Simulational Physics, U. of Georgia, Athens, Georgia 30602, Georgia
Kun Chen: Center for Simulational Physics, U. of Georgia, Athens, Georgia 30602, Georgia

International Journal of Modern Physics C (IJMPC), 1996, vol. 07, issue 03, 401-408

Abstract: Spin dynamics simulations have been used to study dynamic critical behavior of classical Heisenberg magnets. The temporal evolutions of the spin configurations were determined numerically from coupled equations of motion by a fourth-order predictor corrector method, with initial spin configurations generated by Monte-Carlo simulations. The neutron scattering function,S (q, ω), was calculated from the space and time displaced spin-spin correlation function and the dynamic critical exponentzwas extracted using dynamic finite size scaling theory. For both ferromagnetic and antiferromagnetic models we find good agreement with theoretical predictions and experimental results.

Date: 1996
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DOI: 10.1142/S012918319600034X

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