Europhys. Lett, 47 (2), pp. 158-163 (1999)
Preasymptotic multiscaling in the phase-ordering dynamics of the kinetic Ising model
C. Castellano 1 and M. Zannetti 2
1 The Abdus Salam International Centre for Theoretical Physics
Strada Costiera 11, P.O. Box 586, 34100 Trieste, Italy
2 Istituto Nazionale di Fisica della Materia, Unità di Salerno and Dipartimento di Fisica
Università di Salerno - I-84081 Baronissi (Salerno), Italy
(received 6 November 1998; accepted in final form 13 May 1999)
PACS. 05.70Fh - Phase transitions: general studies.
PACS. 64.60Cn - Order-disorder transformations; statistical mechanics of model systems.
PACS. 64.75 - Solubility, segregation, and mixing; phase separation.
The evolution of the structure factor is studied during the phase-ordering dynamics of the kinetic Ising model with conserved order parameter. A preasymptotic multiscaling regime is found as in the solution of the Cahn-Hilliard-Cook equation, revealing that the late stage of phase ordering is always approached through a crossover from multiscaling to standard scaling, independently of the nature of the microscopic dynamics.
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