Dynamics of Ordering of Isotropic Magnets

Details Dynamics of Ordering of Isotropic Magnets Dynamics of Ordering of Isotropic Magnets

1999-03-03

arxiv.org/abs/cond-mat/9903052v1

Physics

Condensed Matter

Statistical Mechanics

7 pages, 5 eps figures. To appear in Physica A as a part of the proceedings of the StatPhys - Calcutta III, January 1999, Calc

Scientific paper

10.1016/S0378-4371(99)00122-3

We study the dynamics of ordering of the nonconserved and conserved Heisenberg magnet. The dynamics consists of two parts - an irreversible dissipation into a heat bath and a reversible precession induced by a torque due to the local molecular field. For quenches both to T=0 and T=T_c, we show that the torque is irrelevant when the dynamics is nonconserved but relevant when the dynamics is conserved and is governed by a new nontrivial fixed point.

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