Dynamics of domains in diluted antiferromagnets

Nowak, Ulrich; Esser, J.; Usadel, Klaus-Dieter

Dynamics of domains in diluted antiferromagnets

Dateien

Nowak_1996_DynamicsDomains.pdfGröße: 864.62 KBDownloads: 237

Datum

1996

Autor:innen

Nowak, Ulrich

Esser, J.

Usadel, Klaus-Dieter

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physica A: Statistical Mechanics and its Applications. 1996, 232(1-2), pp. 40-50. Available under: doi: 10.1016/0378-4371(96)00133-1

Zusammenfassung

We investigate the dynamics of two-dimensional site-diluted Ising antiferromagnets. In an external magnetic field these highly disordered magnetic systems have a domain structure which consists of fractal domains with sizes on a broad range length scales. We focus on the dynamics of these systems during the relaxation from a long-range ordered initial state to the disordered fractal-domain state after applying an external magnetic field. The equilibrium state with applied field consists of fractal domains with a size distribution which follows a power law with an exponential cutoff. The dynamics of the systems can be understood as a growth process of this fractal-domain state in such a way that the equilibrium distribution of domains develops during time. Following these ideas quantitatively we derive a simple description of the time dependence of the order parameter. The agreement with simulations is excellent.

Fachgebiet (DDC)

530 Physik

Schlagwörter

Ising-models, random magnets, dynamics

Zitieren

ISO 690

NOWAK, Ulrich, J. ESSER, Klaus-Dieter USADEL, 1996. Dynamics of domains in diluted antiferromagnets. In: Physica A: Statistical Mechanics and its Applications. 1996, 232(1-2), pp. 40-50. Available under: doi: 10.1016/0378-4371(96)00133-1

BibTex

@article{Nowak1996Dynam-5340,
  year={1996},
  doi={10.1016/0378-4371(96)00133-1},
  title={Dynamics of domains in diluted antiferromagnets},
  number={1-2},
  volume={232},
  journal={Physica A: Statistical Mechanics and its Applications},
  pages={40--50},
  author={Nowak, Ulrich and Esser, J. and Usadel, Klaus-Dieter}
}

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