Correlated gyrotropic modes of multi-skyrmion in elliptical ferromagnetic nanodisks

Liu，X. J.1,2; Wang，Hao1; Tang，Z. K.2

2020-09-15

10.1016/j.jmmm.2020.166965

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   影响因子和分区

0304-8853

1873-4766

We reported a systematic study on the correlated gyrotropic motion of a chain of multiple skyrmions coexistent in an elliptical thin-film ferromagnetic nanodisk. A theoretic model with modified massless Thiele's equations has been set up. The analytical solutions of the model have suggested several gyrotropic eigen modes for the two-skyrmion and three-skyrmion systems with their unique relative configurations among skyrmion cores. Using micromagnetic simulations, we have confirmed the existence of all these analytic modes and their characterized behaviors. In addition, by applying an in-plane exciting magnetic field in the simulations, we exhibited several spin wave modes at higher resonant frequencies with mixing feature of azimuthal and breathing modes.

Analytic model Gyrotropic modes Micromagnetic simulation Multi-skyrmion

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[11474144] ; [SRG2016-00002-FST] ; [CPG2016-00026-FST]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Condensed Matter

WOS:000536494500016

ELSEVIER

20202008657573

Magnetic logic devices ; Natural frequencies ; Analytical models ; Ferromagnetism ; Spin waves

Magnetism: Basic Concepts and Phenomena:701.2 ; Magnetic Materials:708.4 ; Logic Elements:721.2 ; Mathematics:921

PHYSICS

2-s2.0-85084437521

Scopus

1.Shenzhen Institute for Quantum Science and Engineering,and Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
2.Institute of Applied Physics and Materials Engineering,University of Macau,Macau,999078,China

Liu，X. J.,Wang，Hao,Tang，Z. K.. Correlated gyrotropic modes of multi-skyrmion in elliptical ferromagnetic nanodisks[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,2020,510.

Liu，X. J.,Wang，Hao,&Tang，Z. K..(2020).Correlated gyrotropic modes of multi-skyrmion in elliptical ferromagnetic nanodisks.JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,510.

Liu，X. J.,et al."Correlated gyrotropic modes of multi-skyrmion in elliptical ferromagnetic nanodisks".JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 510(2020).