Effect of nonuniform perpendicular anisotropy in ferromagnetic resonance spectra in magnetic nanorings

Abstract The high frequency dynamic behaviors of magnetic nanorings with variable anisotropy along their radius have been studied using micromagnetic simulations. The dynamic susceptibility spectrum and spatial localization of the ferromagnetic resonance modes are investigated by varying anisotropy...

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Autores principales:	E. Saavedra, A. Riveros, J. L. Palma
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/75f2255317b84ec198a7bcdd8c773025
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spelling	oai:doaj.org-article:75f2255317b84ec198a7bcdd8c7730252021-12-02T15:39:59ZEffect of nonuniform perpendicular anisotropy in ferromagnetic resonance spectra in magnetic nanorings10.1038/s41598-021-93597-82045-2322https://doaj.org/article/75f2255317b84ec198a7bcdd8c7730252021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93597-8https://doaj.org/toc/2045-2322Abstract The high frequency dynamic behaviors of magnetic nanorings with variable anisotropy along their radius have been studied using micromagnetic simulations. The dynamic susceptibility spectrum and spatial localization of the ferromagnetic resonance modes are investigated by varying anisotropy gradients in nanorings of 200 nm of external radius, with different internal radii. Both the resonant frequencies and the number of peaks depend on the lower energy magnetization configuration which in turn is a function of anisotropy gradients. Besides, it is shown that the effects of the anisotropy gradient are relevant even for the narrowest ring of 10 nm wide. The idea of controlling frequencies by modifying the anisotropy gradients of the system suggests the possibility of using these nanostructures in potential magnetic controllable frequency devices.E. SaavedraA. RiverosJ. L. PalmaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q E. Saavedra A. Riveros J. L. Palma Effect of nonuniform perpendicular anisotropy in ferromagnetic resonance spectra in magnetic nanorings
description	Abstract The high frequency dynamic behaviors of magnetic nanorings with variable anisotropy along their radius have been studied using micromagnetic simulations. The dynamic susceptibility spectrum and spatial localization of the ferromagnetic resonance modes are investigated by varying anisotropy gradients in nanorings of 200 nm of external radius, with different internal radii. Both the resonant frequencies and the number of peaks depend on the lower energy magnetization configuration which in turn is a function of anisotropy gradients. Besides, it is shown that the effects of the anisotropy gradient are relevant even for the narrowest ring of 10 nm wide. The idea of controlling frequencies by modifying the anisotropy gradients of the system suggests the possibility of using these nanostructures in potential magnetic controllable frequency devices.
format	article
author	E. Saavedra A. Riveros J. L. Palma
author_facet	E. Saavedra A. Riveros J. L. Palma
author_sort	E. Saavedra
title	Effect of nonuniform perpendicular anisotropy in ferromagnetic resonance spectra in magnetic nanorings
title_short	Effect of nonuniform perpendicular anisotropy in ferromagnetic resonance spectra in magnetic nanorings
title_full	Effect of nonuniform perpendicular anisotropy in ferromagnetic resonance spectra in magnetic nanorings
title_fullStr	Effect of nonuniform perpendicular anisotropy in ferromagnetic resonance spectra in magnetic nanorings
title_full_unstemmed	Effect of nonuniform perpendicular anisotropy in ferromagnetic resonance spectra in magnetic nanorings
title_sort	effect of nonuniform perpendicular anisotropy in ferromagnetic resonance spectra in magnetic nanorings
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/75f2255317b84ec198a7bcdd8c773025
work_keys_str_mv	AT esaavedra effectofnonuniformperpendicularanisotropyinferromagneticresonancespectrainmagneticnanorings AT ariveros effectofnonuniformperpendicularanisotropyinferromagneticresonancespectrainmagneticnanorings AT jlpalma effectofnonuniformperpendicularanisotropyinferromagneticresonancespectrainmagneticnanorings
_version_	1718385881196265472

Effect of nonuniform perpendicular anisotropy in ferromagnetic resonance spectra in magnetic nanorings

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