Merging of spin-wave modes in obliquely magnetized circular nanodots

Autor(en)

Julia Kharlan, Vladyslav Borynskyi, Sergey A. Bunyaev, Pavlo Bondarenko, Olga Salyuk, Vladimir Golub, Alexander A. Serga, Oleksandr V. Dobrovolskiy, Andrii Chumak, Roman Verba, Gleb N. Kakazei

Abstrakt

Magnetic nanoelements attract great interest due to their prospects for data storage and signal processing. Spin-wave confinement in these elements implies wave-number quantization, discrete frequency spectra and thus complex resonance patterns, strongly dependent on the elements' geometry and static magnetic configuration. Here we report experimental observation of unconventional single-frequency resonance response of flat circular Permalloy nanodots, which is achieved via the application of a magnetic field at a certain critical angle
̃
𝜃
𝐵 with respect to the dot normal. This observation is explained as the merging of spin-wave eigenmodes under the transition of the spin-wave dispersion from the forward-volume to the backward-volume type, as elucidated by micromagnetic simulations in conjunction with an analytical theory. Our results offer a way for the creation of spin-wave systems with spectrally narrow magnetic noise.

Organisation(en)

Nanomagnetismus und Magnonik

Externe Organisation(en)

Institute of Magnetism, Universidade do Porto, Technische Universität Kaiserslautern

Journal

Physical Review B

Band

105

Anzahl der Seiten

8

ISSN

2469-9950

DOI

https://doi.org/10.1103/PhysRevB.105.014407

Publikationsdatum

01-2022

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie, 103017 Magnetismus

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials, Condensed Matter Physics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/81ccd36b-70ae-4eb7-8dfc-206bd215ebf9