Texture fluctuations and emergent dynamics in coupled nanomagnets

Abstract

We analyse the thermal fluctuations of magnetization textures in two stray field coupled elements, forming mesospins. To this end, the energy landscape associated with the thermal dynamics of the textures is mapped out and asymmetric energy barriers are identified. These barriers are modified by changing the gap that separates the mesospins. Moreover, the coupling between the edges leads to an anisotropy in the curvature of the energy surface at the metastable minima. This yields a dynamic mode splitting of the edge modes and affects the attempt switching frequencies. Thus, we elucidate the mechanism with which the magnons in the thermal bath generate the stochastic fluctuations of the magnetization at the edges.

References in corpus (22)

• The design and verification of Mumax3
• Artificial "spin ice" in a geometrically frustrated lattice of nanoscale ferromagnetic islands
• Extensive degeneracy, Coulomb phase and magnetic monopoles in an artificial realization of the square ice model
• Method for finding mechanism and activation energy of magnetic transitions, applied to skyrmion and antivortex annihilation
• Reconfigurable Training and Reservoir Computing in an Artificial Spin-Vortex Ice via Spin-Wave Fingerprinting
• Spectral analysis of topological defects in an artificial spin-ice lattice
• Adaptively time stepping the stochastic Landau-Lifshitz-Gilbert equation at nonzero temperature: implementation and validation in MuMax3
• The importance of the weak: Interaction modifiers in artificial spin ices
• Dynamics of reconfigurable artificial spin ice: towards magnonic functional materials
• Thermal stability of metastable magnetic skyrmions: Entropic narrowing and significance of internal eigenmodes
• Reconfigurable magnonic mode-hybridisation and spectral control in a bicomponent artificial spin ice
• Reservoir computing with dipole-coupled nanomagnets
• A new look on the two-dimensional Ising model: thermal artificial spins
• Entropy-reduced retention times in magnetic memory elements: A case of the Meyer-Neldel Compensation Rule
• Selective and Fast Plasmon-Assisted Photo-Heating of Nanomagnets; A New Route for Opto-Activated Nanomagnetic Logic and Artificial Spin Systems
• Thermally induced magnetic relaxation in square artificial spin ice
• Dependence of energy barrier reduction on collective excitations in square artificial spin ice: A comprehensive comparison of simulation techniques
• Field-Induced Magnetic Monopole Plasma in Artificial Spin Ice
• Chiral switching and dynamic barrier reductions in artificial square ice
• Collective magnetic dynamics in artificial spin ice probed by AC susceptibility
• The effect of confinement on thermally induced fluctuations in nanomagnets
• Magnetic-Field-Dependent Thermodynamic Properties of Square and Quadrupolar Artificial Spin Ice

Cited by in corpus (4)

• Ultrastrong magnon-magnon coupling and chiral spin-texture control in a dipolar 3D multilayered artificial spin-vortex ice
• Modelling nanomagnet vertex dynamics through Coulomb charges
• Co-existing magnetization reversal mechanisms in shakti spin ice systems
• Magnetic texture control in ion-implanted metamaterials