Publication detail

Spin-Wave Emission from Vortex Cores under Static Magnetic Bias Fields

MAYR, S. FLAJŠMAN, L. FINIZIO, S. HRABEC, A. WEIGAND, M. FORSTER, J. STOLL, H. HEYDERMAN, L. URBÁNEK, M. WINTZ, S. RAABE, J.

Original Title

Spin-Wave Emission from Vortex Cores under Static Magnetic Bias Fields

Type

journal article in Web of Science

Language

English

Original Abstract

We studied the influence of a static in-plane magnetic field on the alternating-field-driven emission of nanoscale spin waves from magnetic vortex cores. Time-resolved scanning transmission X-ray microscopy was used to image spin waves in disk structures of synthetic ferrimagnets and single ferromagnetic layers. For both systems, it was found that an increasing magnetic bias field continuously displaces the wave-emitting vortex core from the center of the disk toward its edge without noticeably altering the spin-wave dispersion relation. In the case of the single-layer disk, an anisotropic lateral expansion of the core occurs at higher magnetic fields, which leads to a directional rather than radial-isotropic emission and propagation of waves. Micromagnetic simulations confirm these findings and further show that focusing effects occur in such systems, depending on the shape of the core and controlled by the static magnetic bias field.

Keywords

magnetization dynamics; magnonics; X-ray microscopy; spin waves; vortex cores

Authors

MAYR, S.; FLAJŠMAN, L.; FINIZIO, S.; HRABEC, A.; WEIGAND, M.; FORSTER, J.; STOLL, H.; HEYDERMAN, L.; URBÁNEK, M.; WINTZ, S.; RAABE, J.

Released

24. 2. 2021

Publisher

American Chemical Society

Location

WASHINGTON

ISBN

1530-6992

Periodical

Nano Letters

Year of study

21

Number

4

State

United States of America

Pages from

1584

Pages to

1590

Pages count

7

URL

https://pubs.acs.org/doi/10.1021/acs.nanolett.0c03740

Full text in the Digital Library

http://hdl.handle.net/11012/202264

BibTex

@article{BUT171145,
  author="Sina {Mayr} and Lukáš {Flajšman} and Simone {Finizio} and Aleš {Hrabec} and Markus {Weigand} and Johannes {Forster} and Hermann {Stoll} and Laura J. {Heyderman} and Michal {Urbánek} and Sebastian {Wintz} and Jorg {Raabe}",
  title="Spin-Wave Emission from Vortex Cores under Static Magnetic Bias Fields",
  journal="Nano Letters",
  year="2021",
  volume="21",
  number="4",
  pages="1584--1590",
  doi="10.1021/acs.nanolett.0c03740",
  issn="1530-6992",
  url="https://pubs.acs.org/doi/10.1021/acs.nanolett.0c03740"
}