Magnetic Vortex Core Dynamics in a Ferromagnetic Dot

Abstract

We report direct imaging by means of x-ray photoemission electron microscopy of the dynamics of magnetic vortices confined in micron-size circular Permalloy dots that are 30 nm thick. The vortex core positions oscillate on a 10-ns timescale in a self-induced magnetostatic potential well after the in-plane magnetic field is turned off. The measured oscillation frequencies as a function of the aspect ratio (thickness/radius) of the dots are in agreement with theoretical calculations presented for the same geometry.

18 pages including 4 figures

References in corpus (5)

• Imaging of Spin Dynamics in Closure Domain and Vortex Structures
• Magnetic Vortex Resonance in Patterned Ferromagnetic Dots
• Boundary conditions for magnetization in magnetic nano-elements
• Vortex state oscillations in soft magnetic cylindrical dots
• Relaxation schemes for normal modes of magnetic vortices: Application to S-matrix

Cited by in corpus (78)

• Current-induced skyrmion dynamics in constricted geometries
• Electrical switching of vortex core in a magnetic disk
• Dynamic Origin of Vortex Core Switching in Soft Magnetic Nanodots
• Current-driven vortex oscillations in metallic nanocontacts
• Inertia and chiral edge modes of a skyrmion magnetic bubble
• Understanding of complex periodic transformations of moving domain walls in magnetic nanostripes
• Universal criterion and phase diagram for switching a magnetic vortex core in soft magnetic nanodots
• Ultrafast Vortex-Core Reversal Dynamics in Ferromagnetic Nanodots
• Dynamics of Pinned Magnetic Vortices
• Low-frequency vortex dynamic susceptibility and relaxation in mesoscopic ferromagnetic dots
• Blowing Polar Skyrmion Bubbles in Oxide Superlattices
• Excitation of spin dynamics by spin-polarized current in vortex state disks
• Machine-learning assistant DFT study of half-metallic full-Heusler alloy N2CaNa: structural, electronic, mechanical, and thermodynamics properties
• Dynamic origin of azimuthal modes splitting in vortex-state magnetic dots
• Switching magnetic vortex core by a single nanosecond current pulse
• Phase locking dynamics of dipolarly coupled vortex-based spin transfer oscillators
• Harmonic oscillator model for current- and field-driven magnetic vortices
• Vortex dynamics in confined stratified conditions
• Spin-Wave Spectrum in Magnetic Nanodot with Continuous Transition between Vortex, Bloch-type Skyrmion and Néel-type Skyrmion States
• Collective modes for an array of magnetic dots in the vortex state
• Two Circular-Rotational Eigenmodes in Vortex Gyrotropic Motions in Soft Magnetic Nanodots
• Chiral edge mode in the coupled dynamics of magnetic solitons in a honeycomb lattice
• Conserved momenta of a ferromagnetic soliton
• Current-induced vortex displacement and annihilation in a single Permalloy disk
• Time-resolved x-ray microscopy for materials science
• Pinning of a Bloch point by an atomic lattice
• Quantitative understanding of magnetic vortex oscillations driven by spin-polarized out-of-plane dc current: Analytical and micromagnetic numerical study
• Optimizing magneto-dipolar interactions for synchronizing vortex based spin-torque nano-oscillators
• Enhanced Non-Adiabaticity in Vortex Cores due to the Emergent Hall Effect
• Normal modes of coupled vortex gyration in two spatially separated magnetic nanodisks
• Predicted defect induced vortex core switching in thin magnetic nanodisks
• Periodic structure of memory function in spintronics reservoir with feedback current
• Non-linear vortex dynamics and transient effects in ferromagnetic disks
• Probing the anharmonicity of the potential well for magnetic vortex core in nanodot
• Proposal of a robust measurement scheme for the non-adiabatic spin torque using the displacement of magnetic vortices
• Step-like dependence of memory function on pulse width in spintronics reservoir computing
• How hole defects modify vortex dynamics in ferromagnetic nanodisks
• Chaos in nanomagnet via feedback current
• Topological magnetic solitons on a paraboloidal shell
• Effective damping enhancement in noncollinear spin structures
• Vortex mechanics in planar nano-magnets
• Designing large arrays of interacting spin-torque nano-oscillators for microwave information processing
• Strong coupling of a single photon to a magnetic vortex
• Polarization-selective vortex-core switching by orthogonal Gaussian-pulse currents
• Switching phenomena in magnetic vortex dynamics
• Localized magnetic fields enhance the field-sensitivity of the gyrotropic resonance frequency of a magnetic vortex
• Input-driven chaotic dynamics in vortex spin-torque oscillator
• Development of a SEMPA system for magnetic imaging with ns time resolution and phase-sensitive detection
• Thermal vortex dynamics in thin circular ferromagnetic nanodisks
• Interplay between spin wave and magnetic vortex
• Magnetodipolar interlayer interaction effect on the magnetization dynamics of a trilayer square element with the Landau domain structure
• Excitation modes of vortices in sub-micron magnetic disks
• Vortex precession frequency and its amplitude-dependent shift in cylindrical nanomagnets
• Annihilation of Domain Walls in a Ferromagnetic Wire
• Circular single domains in hemispherical small size Permalloy clusters
• Non-linear radial spinwave modes in thin magnetic disks
• Current-driven vortex oscillations in metallic nanocontacts: Zero-field oscillations and training effects
• Single array of magnetic vortex disks uses in-plane anisotropy to create different logic gates
• Indirect switching of vortex polarity through magnetic dynamic coupling
• Topological constraints on positions of magnetic solitons in multiply-connected planar magnetic nano-elements
• Quantum dynamics of vortices in mesoscopic magnetic disks
• Temperature-Dependent Anisotropic Magnetoresistance and Spin-Torque-Driven Vortex Dynamics in a Single Microdisk
• Large amplitude vortex gyration in Permalloy/Bi${}_2$Se${}_3$-like heterostructures
• Nontrivial Aharonov-Bohm effect and alternating dispersion of magnons in cone-state ferromagnetic rings
• Magnetic vortex nucleation/annihilation in artificial-ferrimagnet microdisks
• Quantitative and realistic description of the magnetic potential energy of spin-torque vortex oscillators
• Chaotic magnetization dynamics driven by feedback magnetic field
• Bound-states and polarized charged zero modes in three-dimensional topological insulators induced by a magnetic vortex
• Metastable states of sub-micron scale ferromagnetic periodic antidot arrays
• Associative memory by virtual oscillator network based on single spin-torque oscillator
• Analytical model of the inertial dynamics of a magnetic vortex
• Chirality-mediated bistability and strong frequency downshifting of the gyrotropic resonance of a dynamically de-stiffened magnetic vortex
• Surface anisotropy in a magnetic cylinder induced by the displacement of a vortex core
• Controlling energy transfer time between two coupled magnetic vortex-state disks
• Vortex Mechanics in Thin Ferromagnetic Nanodisks
• Observation of magnetic helicoidal dichroism with extreme ultraviolet light vortices
• The dynamics of magnetic vortex states in a single permalloy nanoparticle
• Magnetic helicoidal dichroism in reflection by magnetic vortices