The internal dynamic modes of an antiskyrmion in ultrathin ferromagnetic nanodisks

Liu，X. J.1,2,3; Guo，Liqian2,3; Wang，Hao2,3; Tang，Z. K.1

2020-07-01

10.1063/5.0017607

AIP Advances   影响因子和分区

2158-3226

2158-3226

We report a numerical study on the internal resonant modes of an antiskyrmion structure in thin-film ferromagnetic nanodisks by using micromagnetic simulations. As the samples are excited by an oscillating magnetic field along different directions, we are able to resolve several sets of resonant eigenmodes: gyrotropic mode and azimuthal and radial spin wave modes. At the in-plane field excitation, the gyrotropic mode at the low frequency behaves consistently with Thiele's analytic theory, while a pair of twin azimuthal spin wave modes at higher frequencies demonstrate that their splitting is strongly relevant to the coexistent gyrotropic mode. At the out-of-plane field excitation, several breathing-like radial spin wave modes have been found. In addition, we carry out a brief comparison between these modes and their counterpart modes of an isolated skyrmion structure. We also quantitatively investigate the dependence of the eigenfrequencies of these modes on the different parameter sets of the sample size and internal interactions, which exhibit complex relationships between the internal dynamic modes of an antiskrymion and the geometry and material of the sample.

SCI ; EI

英语

通讯

Start-up Research[SRG2016-00002-FST] ; Research and Development Grant for Chair Professor[CPG2016-00026-FST] ; National Natural Science Foundation of China[11474144] ; Guangdong Provincial Key Laboratory[2019B121203002]

Science & Technology - Other Topics ; Materials Science ; Physics

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000556700400001

AMER INST PHYSICS

20203409078365

Ferromagnetism ; Spin waves

Magnetism: Basic Concepts and Phenomena:701.2 ; Magnetic Materials:708.4

2-s2.0-85089543017

Scopus

1.Institute of Applied Physics and Materials Engineering,University of Macau,999078,Macao
2.Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen, Guangdong,518055,China
3.Guangdong Provincial Key Laboratory of Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen, Guangdong,518055,China

Liu，X. J.,Guo，Liqian,Wang，Hao,et al. The internal dynamic modes of an antiskyrmion in ultrathin ferromagnetic nanodisks[J]. AIP Advances,2020,10(7).

Liu，X. J.,Guo，Liqian,Wang，Hao,&Tang，Z. K..(2020).The internal dynamic modes of an antiskyrmion in ultrathin ferromagnetic nanodisks.AIP Advances,10(7).

Liu，X. J.,et al."The internal dynamic modes of an antiskyrmion in ultrathin ferromagnetic nanodisks".AIP Advances 10.7(2020).