Metastability and dynamic modes in magnetic island chains
arXiv:2310.15350 · doi:10.1088/1361-648X/ac3609
Abstract
The uniform states of a model for one-dimensional chains of thin magnetic islands on a nonmagnetic substrate coupled via dipolar interactions are described here. Magnetic islands oriented with their long axes perpendicular to the chain direction are assumed, whose shape anisotropy imposes a preference for the dipoles to point perpendicular to the chain. The competition between anisotropy and dipolar interactions leads to three types of uniform states of distinctly different symmetries, including metastable transverse or remanent states, transverse antiferromagnetic states, and longitudinal states where all dipoles align with the chain direction. The stability limits and normal modes of oscillation are found for all three types of states, even including infinite range dipole interactions. The normal mode frequencies are shown to be determined from the eigenvalues of the stability problem.
References in corpus (16)
- Artificial "spin ice" in a geometrically frustrated lattice of nanoscale ferromagnetic islands
- Colloquium: Artificial spin ice: Designing and imaging magnetic frustration
- Spectral analysis of topological defects in an artificial spin-ice lattice
- Effective Temperature in an Interacting, Externally Driven, Vertex System: Theory and Experiment on Artificial Spin Ice
- Reconfigurable spin wave band structure of artificial square spin ice
- Interface-driven spin-torque ferromagnetic resonance by Rashba coupling at the interface between non-magnetic materials
- Sculpting the Spin-Wave Response of Artificial Spin Ice via Microstate Selection
- Dynamics and hysteresis in square lattice artificial spin-ice
- Realization of Rectangular Artificial Spin Ice and Direct Observation of High Energy Topology
- Magnetic anisotropy of elongated thin ferromagnetic nano-islands for artifical spin ice arrays
- Effect of long-and short-range interactions on the thermodynamics of dipolar spin ice
- Magnetic oscillation modes in square lattice artificial spin ice
- Stable and unstable trajectories in a dipolar chain
- Order and thermalized dynamics in Heisenberg-like square and Kagomé spin ices
- Spin wave spectral probing of possible microstates in building-block of macroscopically degenerate artificial spin ice
- Morphological Inversion of Complex Diffusion