Energy minimization and AC demagnetization in a nanomagnet array

Abstract

We study AC demagnetization in frustrated arrays of single-domain ferromagnetic islands, exhaustively resolving every (Ising-like) magnetic degree of freedom in the systems. Although the net moment of the arrays is brought near zero by a protocol with sufficiently small step size, the final magnetostatic energy of the demagnetized array continues to decrease for finer-stepped protocols and does not extrapolate to the ground state energy. The resulting complex disordered magnetic state can be described by a maximum-entropy ensemble constrained to satisfy just nearest-neighbor correlations.

Published Version

References in corpus (6)

• Jamming at Zero Temperature and Zero Applied Stress: the Epitome of Disorder
• Artificial "spin ice" in a geometrically frustrated lattice of nanoscale ferromagnetic islands
• The Jamming Transition in Granular Systems
• Demagnetization Protocols for Frustrated Interacting Nanomagnet Arrays
• Hysteretic Optimization
• Ground state optimization and hysteretic demagnetization: the random-field Ising model

Cited by in corpus (56)

• Colloquium: Artificial spin ice: Designing and imaging magnetic frustration
• Two-stage ordering of spins in a dipolar spin ice on the kagome lattice
• Rewritable Artificial Magnetic Charge Ice
• Artificial Kagome Arrays of Nanomagnets: A Frozen Dipolar Spin Ice
• Effective Temperature in an Interacting, Externally Driven, Vertex System: Theory and Experiment on Artificial Spin Ice
• Unhappy Vertices in Artificial Spin Ice: Degeneracy from Vertex-Frustration
• Melting artificial spin ice
• Magnetic monopole and string excitations in a two-dimensional spin ice
• Creating Artificial Ice States Using Vortices in Nanostructured Superconductors
• Disorder strength and field-driven ground state domain formation in artificial spin ice: experiment, simulation and theory
• Dynamics of magnetic charges in artificial spin ice
• Conditions for free magnetic monopoles in nanoscale square arrays of dipolar spin ice
• Ice Rule and Emergent Frustration in Particle Ice and Beyond
• Perpendicular Magnetization and Generic Realization of the Ising Model in Artificial Spin Ice
• Direct entropy determination and application to artificial spin ice
• Vertex dynamics in finite two dimensional square spin ices
• Comparing artificial frustrated magnets: tuning symmetry in nanomagnet arrays
• Domain dynamics and fluctuations in artificial square ice at finite temperatures
• Frustration and thermalisation in an artificial magnetic quasicrystal
• FePd${}_3$ as a material for thermally active artificial spin ice
• Degeneracy and criticality from emergent frustration in artificial spin ice
• Diversity enabling equilibration: disorder and the ground state in artificial spin ice
• Thermodynamics of elementary excitations in artificial magnetic square ice
• Chiral nature of magnetic monopoles in artificial spin ice
• Hysteresis and Return Point Memory in Artificial Spin Ice Systems
• Magnetic diffuse scattering in artificial kagome spin ice
• Non-universality of artificial frustrated spin systems
• Charge ordering of magnetic monopoles in triangular spin ice patterns
• Emergent Geometric Frustration of Artificial Magnetic Skyrmion Crystals
• Kinetic pathways to the magnetic charge crystal in artificial dipolar spin ice
• Understanding Thermal Annealing of Artificial Spin Ice
• Extending spin ice concepts to another geometry: the artificial triangular spin ice
• Nambu monopoles interacting with lattice defects in two-dimensional artificial square spin ice
• On thermalization of magnetic nano-arrays at fabrication
• Competing interactions in artificial spin chains
• Tuning magnetic frustration of nanomagnets in triangular-lattice geometry
• Dumping Topological Charges on Neighbors: Ice Manifolds for Colloids and Vortices
• Artificial out-of-plane Ising antiferromagnet on the kagome lattice with very small further neighbour couplings
• Direct visualization of vortex ice in a nanostructured superconductor
• Clocked dynamics in artificial spin ice
• Ignoring your neighbors: Moment correlations dominated by indirect or distant interactions in an ordered nanomagnet array
• flatspin: A Large-Scale Artificial Spin Ice Simulator
• A network model for field and quenched disorder effects in artificial spin ice
• Characterization of switching field distributions in Ising-like magnetic arrays
• Efficient demagnetization protocol for the artificial triangular spin ice
• Magnetic-Field-Dependent Thermodynamic Properties of Square and Quadrupolar Artificial Spin Ice
• Artificial Spin Ice: A Tutorial on Design and Control of Geometry, Microstate, Magnon Dynamics & Neuromorphic Computing
• Quantum phase diagram of two-dimensional transverse field Ising model: unconstrained tree tensor network and mapping analysis
• Macroscopic Magnetic Monopoles in a 3D-Printed Mechano-Magnet
• Magnetization dynamics of weakly interacting sub-100 nm square artificial spin ices
• Magnetization states and switching in narrow-gapped ferromagnetic nanorings
• Field-induced antiferromagnetic correlations in a nanopatterned van der Waals ferromagnet: a potential artificial spin ice
• Metastability and dynamics in remanent states of square artificial spin ice with long-range dipole interactions
• Topology by Design in Magnetic nano-Materials: Artificial Spin Ice
• Sub-tesla on-chip nanomagnetic metamaterial platform for angle-resolved photoemission spectroscopy
• Attaining the Ground State of Kagome Artificial Spin Ice via Ultrafast Site-Specific Laser Annealing