Merging of spin-wave modes in obliquely magnetized circular nanodots

被引：3

作者：

Kharlan, Julia ^{[1
]}

Borynskyi, Vladyslav ^{[1
]}

Bunyaev, Sergey A. ^{[2
]}

Bondarenko, Pavlo ^{[1
]}

Salyuk, Olga ^{[1
]}

Golub, Vladimir ^{[1
]}

Serga, Alexander A. ^{[3
]}

Dobrovolskiy, Oleksandr, V ^{[4
]}

Chumak, Andrii ^{[4
]}

Verba, Roman ^{[1
]}

Kakazei, Gleb N. ^{[2
]}

机构：

[1] Inst Magnetism, UA-03142 Kiev, Ukraine

[2] Univ Porto, Inst Phys Adv Mat Nanotechnol & Photon IFIMUP, Dept Fis & Astron, P-4169007 Porto, Portugal

[3] Tech Univ Kaiserslautern, Fachbereich Phys & Landesforschungszentrum OPTIMA, D-67663 Kaiserslautern, Germany

[4] Univ Vienna, Fac Phys, A-1090 Vienna, Austria

来源：

PHYSICAL REVIEW B | 2022年 / 105卷 / 01期

基金：

新加坡国家研究基金会; 奥地利科学基金会;

关键词：

D O I：

10.1103/PhysRevB.105.014407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 (theta) over tilde (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.

引用

页数：8

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