Temperature dependence of spin pinning and spin-wave dispersion in nanoscopic ferromagnetic waveguides

Autor(en)

Björn Heinz, Qi Wang, Roman Verba, Vitaliy I. Vasyuchka, Martin Kewenig, Philipp Pirro, Michael Schneider, Thomas Meyer, Bert Lägel, Carsten Dubs, Thomas Brächer, Oleksandr V. Dobrovolskiy, Andrii V. Chumak

Abstrakt

The field of magnonics attracts significant attention due to the possibility of utilizing information coded into the spin-wave phase or amplitude to perform computation operations on the nanoscale. Recently, spin waves were investigated in Yttrium Iron Garnet (YIG) waveguides with widths ranging down to 50 nm and aspect ratios thickness over width approaching unity. A critical width was found, below which the exchange interaction suppresses the dipolar pinning phenomenon and the system becomes unpinned. Here we continue these investigations and analyse the pinning phenomenon and spin-wave dispersions as a function of temperature, thickness and material of choice. Higher order modes, the influence of a finite wavevector along the waveguide and the impact of the pinning phenomenon on the spin-wave lifetime are discussed as well as the influence of a trapezoidal cross section and edge roughness of the waveguides. The presented results are of particular interest for potential applications in magnonic devices and the incipient field of quantum magnonics at cryogenic temperatures.

Organisation(en)

Nanomagnetismus und Magnonik

Externe Organisation(en)

Technische Universität Kaiserslautern, Johannes Gutenberg-Universität Mainz, National Academy of Sciences of Ukraine (NASU), THATec Innovat GmbH, Innovent e.V. Technologieentwicklung Jena

Journal

Ukrainian Journal of Physics

Band

65

Seiten

1094-1108

Anzahl der Seiten

15

ISSN

2071-0186

DOI

https://doi.org/10.15407/ujpe65.12.1094

Publikationsdatum

2020

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie, 103017 Magnetismus

Schlagwörter

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/595dd7dd-8a3d-403d-afbb-3a6f99a5815d