Publication detail

Spin wave propagation in corrugated waveguides

TURČAN, I. FLAJŠMAN, L. WOJEWODA, O. ROUČKA, V. MAN, O. URBÁNEK, M.

Original Title

Spin wave propagation in corrugated waveguides

Type

journal article in Web of Science

Language

English

Original Abstract

Curvature-induced effects allow us to tailor the static and dynamic response of a magnetic system with a high degree of freedom. We study corrugated magnonic waveguides deposited on a sinusoidally modulated substrate prepared by focused electron beam-induced deposition. The curvature of the waveguides with thicknesses comparable to the amplitude of modulation modifies the contributions of dipolar and exchange energies and results in an effective anisotropy term, which is strong enough to overcome the shape anisotropy. At zero external magnetic field, the magnetization of the waveguide then points perpendicular to its long axis in a geometry, which is best-suited to spin-wave propagation. We show, by Brillouin light scattering microscopy, that without the presence of the external magnetic field, spin waves propagate over a distance 10xlarger in the corrugated waveguide than in the planar waveguide. We further analyze the influence of the modulation amplitude on the spin-wave propagation length and conclude that for moderate modulation amplitudes, the spin-wave decay length is not affected. For larger amplitudes, the decay length decreases linearly with increasing modulation. The presented approach opens many possibilities for the design of complex 2D magnonic circuits where the waveguides can be oriented in any direction and placed anywhere on the sample while still allowing spin-wave propagation with the same efficiency.

Keywords

Anisotropy; Brillouin scattering; Degrees of freedom (mechanics); Magnetic fields; Modulation; Wave propagation; Waveguides

Authors

TURČAN, I.; FLAJŠMAN, L.; WOJEWODA, O.; ROUČKA, V.; MAN, O.; URBÁNEK, M.

Released

1. 3. 2021

Publisher

AIP Publishing

Location

MELVILLE

ISBN

1077-3118

Periodical

Applied Physics Letters

Year of study

118

Number

9

State

United States of America

Pages from

1

Pages to

5

Pages count

5

URL

https://aip.scitation.org/doi/10.1063/5.0041138

Full text in the Digital Library

http://hdl.handle.net/11012/201153

BibTex

@article{BUT171712,
  author="Igor {Turčan} and Lukáš {Flajšman} and Ondřej {Wojewoda} and Václav {Roučka} and Ondřej {Man} and Michal {Urbánek}",
  title="Spin wave propagation in corrugated waveguides",
  journal="Applied Physics Letters",
  year="2021",
  volume="118",
  number="9",
  pages="1--5",
  doi="10.1063/5.0041138",
  issn="1077-3118",
  url="https://aip.scitation.org/doi/10.1063/5.0041138"
}