Spin-Wave Spectrum in Magnetic Nanodot with Continuous Transition between Vortex, Bloch-type Skyrmion and Néel-type Skyrmion States

Abstract

We study spin-wave excitations in a circular ferromagnetic nanodot in different inhomogeneous, topologically non-trivial magnetization states, specifically, vortex and skyrmion states. Gradual change in the strength of the out-of-plane magnetic anisotropy and the Dzyaloshinskii-Moriya exchange interaction leads to continuous phase transitions between different stable magnetic configurations and allows for mapping of dynamic spin modes in and between the vortex, Bloch-type skyrmion and Néel-type skyrmion states. Our study elucidates the connections between gyrotropic modes, azimuthal spin waves and breathing modes in various stable magnetization states and helps to understand the rich spin excitation spectrum on the skyrmion background.

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Cited by in corpus (27)

• Skyrmions in Magnetic Multilayers
• Collective spin excitations of helices and magnetic skyrmions: review and perspectives of magnonics in non-centrosymmetric magnets
• Spin eigen-excitations of the magnetic skyrmion and problem of the effective mass
• Thermal stability of metastable magnetic skyrmions: Entropic narrowing and significance of internal eigenmodes
• Unravelling Dzyaloshinskii-Moriya interaction and chiral nature of Graphene/Cobalt interface
• Twisted Magnon Frequency Comb and Penrose Superradiance
• Proposal for a micromagnetic standard problem for materials with Dzyaloshinskii-Moriya interaction
• Coupled skyrmion breathing modes in synthetic ferri- and antiferromagnets
• Azimuthal Spin Wave Excitations in Magnetic Nanodots over the Soliton Background: Vortex, Bloch and Néel-like skyrmions
• Colloquium: Quantum Properties and Functionalities of Magnetic Skyrmions
• Dynamic Excitations of Chiral Magnetic Textures
• Field-tuned spin excitation spectrum of $k\pi$-skyrmion
• Eigenmodes of Neel skyrmions in ultrathin magnetic films
• Pushing down the lateral dimension of single and coupled magnetic dots to the nanometric scale: characteristics and evolution of the spin-wave eigenmodes
• Bi-stability of magnetic skyrmions in ultrathin multilayer nanodots induced by magnetostatic interaction
• Intrinsic mixed Bloch-Néel character and chirality switch of skyrmions in asymmetric epitaxial trilayer
• A semi-analytical approach to calculating the dynamic modes of magnetic vortices with Dzyaloshinskii-Moriya interactions
• Effect of Dzyaloshinskii-Moriya interaction on magnetic vortex switching driven by radial spin waves
• Effect of collective spin excitation on electronic transport in topological spin texture
• Spin-wave mediated interactions for Majority Computation using Skyrmions and Spin-torque Nano-oscillators
• Stabilization and dynamics of magnetic antivortices in a nanodisk with anisotropic Dzyaloshinskii-Moriya interaction
• Magnetic skyrmion spectrum under voltage excitation and its linear modulation
• From the spin eigenmodes of isolated Néel skyrmions to the magnonic bands of a skyrmionic crystal: a micromagnetic study as a function of the strength of both the interfacial Dzyaloshinskii-Moriya and the exchange constants
• Eigenmodes of magnetic skyrmion lattices
• Commensurate vortex core switching in magnetic nanodisks at Gigahertz frequencies
• Zero-field topological Hall effect in BiSb/MnGa bi-layers as a signature of ground-state skyrmions at room temperature
• Field Theory of Linear Spin-Waves in Finite Textured Ferromagnets