Ferromagnetic vortex core switching at elevated temperatures

Lebecki, Krzysztof; Nowak, Ulrich

Ferromagnetic vortex core switching at elevated temperatures

Dateien

Lebecki_279140.pdfGröße: 1.03 MBDownloads: 460

Datum

2014

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review B. 2014, 89(1). ISSN 1098-0121. eISSN 1095-3795. Available under: doi: 10.1103/PhysRevB.89.014421

Zusammenfassung

An approach for the investigation of vortex core switching is presented. Thermal effects up to the Curie point are included in a micromagnetic framework based on the recently developed Landau-Lifshitz-Bloch equation. In this approach it is easier to avoid numerical discretization artifacts, commonly present when a Bloch point is mediating the switching process. Switching in thin circular permalloy disks caused by the application of a slowly increasing magnetic field oriented orthogonally to the disk is considered. An energy barrier which can be overcome by thermal fluctuations is taken into account, leading to a strong influence of the temperature on the switching field. In particular, the switching field goes to zero at a significantly smaller temperature than the Curie temperature. The deduced nucleation volume is smaller than the typical grain size in permalloy.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

LEBECKI, Krzysztof, Ulrich NOWAK, 2014. Ferromagnetic vortex core switching at elevated temperatures. In: Physical Review B. 2014, 89(1). ISSN 1098-0121. eISSN 1095-3795. Available under: doi: 10.1103/PhysRevB.89.014421

BibTex

@article{Lebecki2014Ferro-27914,
  year={2014},
  doi={10.1103/PhysRevB.89.014421},
  title={Ferromagnetic vortex core switching at elevated temperatures},
  number={1},
  volume={89},
  issn={1098-0121},
  journal={Physical Review B},
  author={Lebecki, Krzysztof and Nowak, Ulrich}
}

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Universitätsbibliographie

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