Volume 62, Number 5, June 2003
|Page(s)||664 - 670|
|Published online||01 May 2003|
Scaling of the magnetic linear response in phase-ordering kinetics
Laboratoire de Physique des Matériaux (Laboratoire associé au CNRS UMR 7556.) , Université Henri Poincaré Nancy I B.P. 239, F-54506 Vandœuvre lès Nancy Cedex, France
2 Institut für Festkörperforschung (Theorie II), Forschungszentrum Jülich D-52425 Jülich, Germany
3 Institut für Theoretische Physik I, Universität Erlangen-Nürnberg D-91058 Erlangen, Germany
Accepted: 7 April 2003
The scaling of the thermoremanent magnetization and of the dissipative part of the non-equilibrium magnetic susceptibility is analysed as a function of the waiting time s for a simple ferromagnet undergoing phase-ordering kinetics after a quench into the ferromagnetically ordered phase. Their scaling forms describe the crossover between two power law regimes governed by the non-equilibrium exponents a and , respectively. A relation between a, the dynamical exponent z and the equilibrium exponent η is derived from scaling arguments. Explicit tests in the Glauber-Ising model and the kinetic spherical model are presented.
PACS: 05.70.Ln – Nonequilibrium and irreversible thermodynamics / 75.40.Gb – Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.) / 64.60.Ht – Dynamic critical phenomena
© EDP Sciences, 2003
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