Detail publikace

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.

Originální název

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

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

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

Vydáno

24. 2. 2021

Nakladatel

American Chemical Society

Místo

WASHINGTON

ISSN

1530-6992

Periodikum

Nano Letters

Ročník

21

Číslo

4

Stát

Spojené státy americké

Strany od

1584

Strany do

1590

Strany počet

7

URL

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

Plný text v Digitální knihovně

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"
}