Volume 68, Number 6, December 2004
|Page(s)||881 - 887|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||12 November 2004|
Domain growth in random magnets
Theoretische Physik, Universität des Saarlandes - 66041 Saarbrücken, Germany
2 School of Physical Sciences, Jawaharlal Nehru University - New Delhi 110067, India
Accepted: 14 October 2004
We study the kinetics of domain growth in ferromagnets with random exchange interactions. We present detailed Monte Carlo results for the nonconserved random-bond Ising model, which are consistent with power law growth with a variable exponent. These results are interpreted in the context of disorder barriers with a logarithmic dependence on the domain size. Further, we clarify the implications of logarithmic barriers for both nonconserved and conserved domain growth.
PACS: 75.40.Gb – Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.) / 05.50.+q – Lattice theory and statistics (Ising, Potts, etc.) / 75.10.Nr – Spin-glass and other random models
© EDP Sciences, 2004
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