Non-exponential relaxation in diluted antiferromagnets

Staats, Michael; Nowak, Ulrich; Usadel, Klaus-Dieter

Non-exponential relaxation in diluted antiferromagnets

Dateien

Staats_1998_Non_exponentialRelaxation.pdfGröße: 125.64 KBDownloads: 410

Datum

1998

Autor:innen

Staats, Michael

Nowak, Ulrich

Usadel, Klaus-Dieter

Publikationstyp

Zeitschriftenartikel

unikn.publication.listelement.citation.prefix.version.undefined

Phase Transitions. 1998, 65(1/4), pp. 159-167. Available under: doi: 10.1080/01411599808209286

Zusammenfassung

Dilute Ising antiferromagnets in a homogenous magnetic field have a disordered phase for sufficiently large values of the field and for low temperatures. Here, the system is in a domain state with a broad size-distribution of fractal domains. We study the relaxation dynamics of this domain state after removing the external field for two and three dimensions. Using Monte Carlo simulation techniques, we measure the decay of the remanent magnetization. Its temperature dependence can be understood as thermal activation. All data can be described by a unique generalized power law for a wide range of temperatures in two-and three-dimensions. The question of whether the exponent of the generalized power-law is universal remains open.

Fachgebiet (DDC)

530 Physik

Schlagwörter

Ising models, random magnets, numerical methods

Zitieren

ISO 690

STAATS, Michael, Ulrich NOWAK, Klaus-Dieter USADEL, 1998. Non-exponential relaxation in diluted antiferromagnets. In: Phase Transitions. 1998, 65(1/4), pp. 159-167. Available under: doi: 10.1080/01411599808209286

BibTex

@article{Staats1998Nonex-8889,
  year={1998},
  doi={10.1080/01411599808209286},
  title={Non-exponential relaxation in diluted antiferromagnets},
  number={1/4},
  volume={65},
  journal={Phase Transitions},
  pages={159--167},
  author={Staats, Michael and Nowak, Ulrich and Usadel, Klaus-Dieter}
}

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