Dresden 2003 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 10: Statistical physics far from thermal equilibrium

DY 10.3: Vortrag

Montag, 24. März 2003, 10:15–10:30, G\"OR/226

Scaling of the magnetic linear response in phase-ordering kinetics — •Michel Pleimling¹, Malte Henkel², and Matthias Paessens^2,3 — ¹Institut für Theoretische Physik 1, Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany — ²LPM, Université Nancy I, F-54506 Vandœuvre lès Nancy, France — ³Institut für Festkörperforschung (Theorie II), Forschungszentrum Jülich, D-52425 Jülich, Germany

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 cross-over between two power-law regimes governed by two non-equilibrium exponents. Local scale invariance turns these qualitative statements into quantitatively testable predictions which are explictly confirmed in the Glauber-Ising and spherical models.

[1] M. Henkel, M. Pleimling, C. Godrèche und J.-M. Luck, Phys. Rev. Lett. 87, 265701 (2001).

[2] M. Henkel, M. Paessens, and M. Pleimling, cond-mat/0211583.

[3] M. Henkel, Nucl. Phys. B 641, 405 (2002).