Collective ferromagnetism of artificial square spin ice
arXiv:2206.14147 · doi:10.1103/PhysRevLett.129.067201
Abstract
We have studied the temperature and magnetic field dependence of the total magnetic moment of large-area permalloy artificial square spin ice arrays. The temperature dependence and hysteresis behavior are consistent with the coherent magnetization reversal expected in the Stoner-Wohlfarth model, with clear deviations due to inter-island interactions at small lattice spacing. Through micromagnetic simulations, we explore this behavior and demonstrate that the deviations result from increasingly complex magnetization reversal at small lattice spacing, induced by inter-island interactions, and depending critically on details of the island shapes. These results establish new means to tune the physical properties of artificial spin ice structures and other interacting nanomagnet systems, such as patterned magnetic media.
17 pages, 5 figures
References in corpus (21)
- Artificial "spin ice" in a geometrically frustrated lattice of nanoscale ferromagnetic islands
- Roadmap on Spin-Wave Computing
- Reconfigurable Training and Reservoir Computing in an Artificial Spin-Vortex Ice via Spin-Wave Fingerprinting
- Superparamagnetic nanoparticle ensembles
- Spectral analysis of topological defects in an artificial spin-ice lattice
- Fragmentation of magnetism in artificial kagome dipolar spin ice
- Melting artificial spin ice
- Reconfigurable spin wave band structure of artificial square spin ice
- Perpendicular Magnetization and Generic Realization of the Ising Model in Artificial Spin Ice
- Continuous magnetic phase transition in artificial square ice
- Magneto-optical Kerr Effect Studies of Square Artificial Spin Ice
- Direct observation of a dynamical glass transition in a nanomagnetic artificial Hopfield network
- Vogel-Fulcher-Tammann Freezing of a Thermally Fluctuating Artificial Spin Ice Probed by X-ray Photon Correlation Spectroscopy
- Understanding Thermal Annealing of Artificial Spin Ice
- Switchable X-ray Orbital Angular Momentum from an Artificial Spin Ice
- Magnetic anisotropy of elongated thin ferromagnetic nano-islands for artifical spin ice arrays
- Spectral-fingerprinting: Microstate readout via remanence ferromagnetic resonance in artificial spin systems
- Chiral switching and dynamic barrier reductions in artificial square ice
- Collective magnetic dynamics in artificial spin ice probed by AC susceptibility
- Tailoring magnetization reversal of a single-domain bar nanomagnet via its end geometry
- Field-driven Reversal Models in Artificial Spin Ice