Domain dynamics of magnetic films with perpendicular anisotropy

Nowak, Ulrich; Heimel, Jörg; Kleinefeld, Theo; Weller, Dieter

Domain dynamics of magnetic films with perpendicular anisotropy

Dateien

Nowak_1997_DomainDynamics.pdfGröße: 111.18 KBDownloads: 190

Datum

1997

Autor:innen

Nowak, Ulrich

Heimel, Jörg

Kleinefeld, Theo

Weller, Dieter

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review B. 1997, 56(13), pp. 8143-8148. Available under: doi: 10.1103/PhysRevB.56.8143

Zusammenfassung

We study the magnetic properties of nanoscale magnetic films with large perpendicular anisotropy comparing polarization-microscopy measurements on Co28Pt72-alloy samples based on the magneto-optical Kerr effect with Monte Carlo simulations of a corresponding micromagnetic model. In our model the magnetic film is described in terms of single-domain magnetic grains interacting via exchange as well as via dipolar forces. Additionally, the model contains an energy barrier which has to be overcome in order to reverse a single cell and a coupling to an external magnetic field. Disorder is taken into account. We focus on the understanding of the dynamics especially the temperature and field dependence of the magnetization reversal process. The experimental and simulation results for hysteresis, the reversal mechanism, domain configurations during the reversal, and the time dependence of the magnetization are in very good qualitative agreement. The results for the field and temperature dependence of the domain wall velocity suggest that for thin films the hysteresis can be described as a depinning transition of the domain walls rounded by thermal activation for finite temperatures.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

NOWAK, Ulrich, Jörg HEIMEL, Theo KLEINEFELD, Dieter WELLER, 1997. Domain dynamics of magnetic films with perpendicular anisotropy. In: Physical Review B. 1997, 56(13), pp. 8143-8148. Available under: doi: 10.1103/PhysRevB.56.8143

BibTex

@article{Nowak1997Domai-5206,
  year={1997},
  doi={10.1103/PhysRevB.56.8143},
  title={Domain dynamics of magnetic films with perpendicular anisotropy},
  number={13},
  volume={56},
  journal={Physical Review B},
  pages={8143--8148},
  author={Nowak, Ulrich and Heimel, Jörg and Kleinefeld, Theo and Weller, Dieter}
}

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