Spin-wave modes of elliptical skyrmions in magnetic nanodots
Magnetic skyrmions, whose shapes are ellipse due to the presence of anisotropic Dzyaloshinskii–Moriya interaction (DMI), have already been discovered in experiments recently. By using micromagnetic simulations, we discuss the ground state and the spin-wave modes of a single elliptical skyrmion in a...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2022-01-01
|
| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ac5df9 |
| _version_ | 1797748575232327680 |
|---|---|
| author | Chendong Jin Shuang Li Hu Zhang Ruining Wang Jianglong Wang Ruqian Lian Penglai Gong Xingqiang Shi |
| author_facet | Chendong Jin Shuang Li Hu Zhang Ruining Wang Jianglong Wang Ruqian Lian Penglai Gong Xingqiang Shi |
| author_sort | Chendong Jin |
| collection | DOAJ |
| description | Magnetic skyrmions, whose shapes are ellipse due to the presence of anisotropic Dzyaloshinskii–Moriya interaction (DMI), have already been discovered in experiments recently. By using micromagnetic simulations, we discuss the ground state and the spin-wave modes of a single elliptical skyrmion in a confined nanodot. It is found that the shapes of skyrmion are stretched into a horizontal ellipse, vertical ellipse, or stripe shape under different strengths of anisotropic DMI. When elliptical skyrmions are excited by in-plane ac magnetic fields, the spin-wave mode contains a counterclockwise rotation mode at high frequencies and a clockwise (CW) rotation mode at low frequencies, and the CW mode depends on the strength of anisotropic DMI. When elliptical skyrmions are excited by out-of-plane ac magnetic fields, the spin-wave mode is split from a simple breathing mode into two complex breathing modes, including a mixed mode of CW rotation and breathing, and another anisotropic breathing mode. Our results provide an understanding of the rich spin-wave modes for skyrmions, which may contribute to the applications in magnonics. |
| first_indexed | 2024-03-12T16:06:46Z |
| format | Article |
| id | doaj.art-a039b7e57e974258956812ae0beb5cef |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:06:46Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-a039b7e57e974258956812ae0beb5cef2023-08-09T14:19:35ZengIOP PublishingNew Journal of Physics1367-26302022-01-0124404300510.1088/1367-2630/ac5df9Spin-wave modes of elliptical skyrmions in magnetic nanodotsChendong Jin0https://orcid.org/0000-0002-9859-8471Shuang Li1Hu Zhang2Ruining Wang3https://orcid.org/0000-0002-2112-9108Jianglong Wang4Ruqian Lian5Penglai Gong6Xingqiang Shi7https://orcid.org/0000-0003-2029-1506College of Physics Science and Technology, Key Laboratory of Optic-Electronic Information and Materials of Hebei Province, Institute of Life Science and Green Development, Hebei University , Baoding 071002, People’s Republic of ChinaCollege of Physics Science and Technology, Key Laboratory of Optic-Electronic Information and Materials of Hebei Province, Institute of Life Science and Green Development, Hebei University , Baoding 071002, People’s Republic of ChinaCollege of Physics Science and Technology, Key Laboratory of Optic-Electronic Information and Materials of Hebei Province, Institute of Life Science and Green Development, Hebei University , Baoding 071002, People’s Republic of ChinaCollege of Physics Science and Technology, Key Laboratory of Optic-Electronic Information and Materials of Hebei Province, Institute of Life Science and Green Development, Hebei University , Baoding 071002, People’s Republic of ChinaCollege of Physics Science and Technology, Key Laboratory of Optic-Electronic Information and Materials of Hebei Province, Institute of Life Science and Green Development, Hebei University , Baoding 071002, People’s Republic of ChinaCollege of Physics Science and Technology, Key Laboratory of Optic-Electronic Information and Materials of Hebei Province, Institute of Life Science and Green Development, Hebei University , Baoding 071002, People’s Republic of ChinaCollege of Physics Science and Technology, Key Laboratory of Optic-Electronic Information and Materials of Hebei Province, Institute of Life Science and Green Development, Hebei University , Baoding 071002, People’s Republic of ChinaCollege of Physics Science and Technology, Key Laboratory of Optic-Electronic Information and Materials of Hebei Province, Institute of Life Science and Green Development, Hebei University , Baoding 071002, People’s Republic of ChinaMagnetic skyrmions, whose shapes are ellipse due to the presence of anisotropic Dzyaloshinskii–Moriya interaction (DMI), have already been discovered in experiments recently. By using micromagnetic simulations, we discuss the ground state and the spin-wave modes of a single elliptical skyrmion in a confined nanodot. It is found that the shapes of skyrmion are stretched into a horizontal ellipse, vertical ellipse, or stripe shape under different strengths of anisotropic DMI. When elliptical skyrmions are excited by in-plane ac magnetic fields, the spin-wave mode contains a counterclockwise rotation mode at high frequencies and a clockwise (CW) rotation mode at low frequencies, and the CW mode depends on the strength of anisotropic DMI. When elliptical skyrmions are excited by out-of-plane ac magnetic fields, the spin-wave mode is split from a simple breathing mode into two complex breathing modes, including a mixed mode of CW rotation and breathing, and another anisotropic breathing mode. Our results provide an understanding of the rich spin-wave modes for skyrmions, which may contribute to the applications in magnonics.https://doi.org/10.1088/1367-2630/ac5df9elliptical skyrmionspin-wave modeanisotropic DMI |
| spellingShingle | Chendong Jin Shuang Li Hu Zhang Ruining Wang Jianglong Wang Ruqian Lian Penglai Gong Xingqiang Shi Spin-wave modes of elliptical skyrmions in magnetic nanodots New Journal of Physics elliptical skyrmion spin-wave mode anisotropic DMI |
| title | Spin-wave modes of elliptical skyrmions in magnetic nanodots |
| title_full | Spin-wave modes of elliptical skyrmions in magnetic nanodots |
| title_fullStr | Spin-wave modes of elliptical skyrmions in magnetic nanodots |
| title_full_unstemmed | Spin-wave modes of elliptical skyrmions in magnetic nanodots |
| title_short | Spin-wave modes of elliptical skyrmions in magnetic nanodots |
| title_sort | spin wave modes of elliptical skyrmions in magnetic nanodots |
| topic | elliptical skyrmion spin-wave mode anisotropic DMI |
| url | https://doi.org/10.1088/1367-2630/ac5df9 |
| work_keys_str_mv | AT chendongjin spinwavemodesofellipticalskyrmionsinmagneticnanodots AT shuangli spinwavemodesofellipticalskyrmionsinmagneticnanodots AT huzhang spinwavemodesofellipticalskyrmionsinmagneticnanodots AT ruiningwang spinwavemodesofellipticalskyrmionsinmagneticnanodots AT jianglongwang spinwavemodesofellipticalskyrmionsinmagneticnanodots AT ruqianlian spinwavemodesofellipticalskyrmionsinmagneticnanodots AT penglaigong spinwavemodesofellipticalskyrmionsinmagneticnanodots AT xingqiangshi spinwavemodesofellipticalskyrmionsinmagneticnanodots |