Vortices in two-dimensional nanorings studied by means of the dynamical matrix method
This paper concerns an investigation of the spin wave excitations in magnetic nanoparticles. We provide a detailed derivation of the theoretical method for the determination of the normal modes of confined magnetic systems based on a discrete lattice of magnetic moments. The method is based on the...
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| Veröffentlicht in: | Физика низких температур |
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| Datum: | 2015 |
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| Sprache: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2015
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| Zitieren: | Vortices in two-dimensional nanorings studied by means of the dynamical matrix method / S. Mamica // Физика низких температур. — 2015. — Т. 41, № 10. — С. 1030–1042. — Бібліогр.: 74 назв. — англ. |
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Mamica, S. 2018-01-05T17:55:31Z 2018-01-05T17:55:31Z 2015 Vortices in two-dimensional nanorings studied by means of the dynamical matrix method / S. Mamica // Физика низких температур. — 2015. — Т. 41, № 10. — С. 1030–1042. — Бібліогр.: 74 назв. — англ. 0132-6414 PACS: 75.10.Hk, 75.75.Jn, 73.90.+f https://nasplib.isofts.kiev.ua/handle/123456789/128086 This paper concerns an investigation of the spin wave excitations in magnetic nanoparticles. We provide a detailed derivation of the theoretical method for the determination of the normal modes of confined magnetic systems based on a discrete lattice of magnetic moments. The method is based on the damping-free Landau–Lifshitz equation and general enough to be utilized for the magnetic system of any dimensionality, magnetic structure, shape, and size. As an example we explore the influence of the competition between exchange and dipolar interactions on the spectrum of normal modes as well as on the stability of the vortex state in two-dimensional nanorings. We show the lowest-frequency mode to be indicative of the dipolar-to-exchange iterations ratio. We also study behavior of the fundamental mode and present the influence of both, the discreteness of the lattice and the dipolar-to-exchange iterations ratio, on its hybridization with azimuthal modes. We complete the paper with a selective review of the spin wave excitations in circular dots to compare with the results obtained for the rings. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 644348. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур К 80-летию уравнения Ландау–Лифшица Vortices in two-dimensional nanorings studied by means of the dynamical matrix method Article published earlier |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Vortices in two-dimensional nanorings studied by means of the dynamical matrix method |
| spellingShingle |
Vortices in two-dimensional nanorings studied by means of the dynamical matrix method Mamica, S. К 80-летию уравнения Ландау–Лифшица |
| title_short |
Vortices in two-dimensional nanorings studied by means of the dynamical matrix method |
| title_full |
Vortices in two-dimensional nanorings studied by means of the dynamical matrix method |
| title_fullStr |
Vortices in two-dimensional nanorings studied by means of the dynamical matrix method |
| title_full_unstemmed |
Vortices in two-dimensional nanorings studied by means of the dynamical matrix method |
| title_sort |
vortices in two-dimensional nanorings studied by means of the dynamical matrix method |
| author |
Mamica, S. |
| author_facet |
Mamica, S. |
| topic |
К 80-летию уравнения Ландау–Лифшица |
| topic_facet |
К 80-летию уравнения Ландау–Лифшица |
| publishDate |
2015 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| description |
This paper concerns an investigation of the spin wave excitations in magnetic nanoparticles. We provide a detailed
derivation of the theoretical method for the determination of the normal modes of confined magnetic systems
based on a discrete lattice of magnetic moments. The method is based on the damping-free Landau–Lifshitz
equation and general enough to be utilized for the magnetic system of any dimensionality, magnetic structure,
shape, and size. As an example we explore the influence of the competition between exchange and dipolar interactions
on the spectrum of normal modes as well as on the stability of the vortex state in two-dimensional
nanorings. We show the lowest-frequency mode to be indicative of the dipolar-to-exchange iterations ratio.
We also study behavior of the fundamental mode and present the influence of both, the discreteness of the lattice
and the dipolar-to-exchange iterations ratio, on its hybridization with azimuthal modes. We complete the paper with
a selective review of the spin wave excitations in circular dots to compare with the results obtained for the rings.
|
| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/128086 |
| citation_txt |
Vortices in two-dimensional nanorings studied by means of the dynamical matrix method / S. Mamica // Физика низких температур. — 2015. — Т. 41, № 10. — С. 1030–1042. — Бібліогр.: 74 назв. — англ. |
| work_keys_str_mv |
AT mamicas vorticesintwodimensionalnanoringsstudiedbymeansofthedynamicalmatrixmethod |
| first_indexed |
2025-11-30T09:46:30Z |
| last_indexed |
2025-11-30T09:46:30Z |
| _version_ |
1850857108863451136 |