Volume 82, Number 1, April 2008
|Number of page(s)||6|
|Published online||05 March 2008|
Geometric properties of two-dimensional coarsening with weak disorder
Université Pierre et Marie Curie - Paris VI, LPTHE UMR 7589 - 4 Place Jussieu, 75252 Paris Cedex 05, France, EU
2 Instituto de Física, Universidade Federal do Rio Grande do Sul - CP 15051, 91501-970 Porto Alegre RS, Brazil
3 School of Physics and Astronomy, University of Manchester - Manchester M13 9PL, UK, EU
Corresponding author: email@example.com
Accepted: 4 February 2008
The domain morphology of weakly disordered ferromagnets, quenched from the high-temperature phase to the low-temperature phase, is studied using numerical simulations. We find that the geometrical properties of the coarsening domain structure, e.g. the distributions of hull-enclosed areas and domain perimeter lengths, are described by a scaling phenomenology in which the growing domain scale is the only relevant parameter. Furthermore, the scaling functions have forms identical to those of the corresponding pure system, extending the “super-universality” property previously noted for the pair correlation function.
PACS: 05.70.Ln – Nonequilibrium and irreversible thermodynamics / 67.30.hj – Spin dynamics / 75.10.Nr – Spin-glass and other random models
© EPLA, 2008
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