Non-universality of artificial frustrated spin systems
arXiv:1407.7416 · doi:10.1103/PhysRevB.90.064411
Abstract
Magnetic frustration effects in artificial kagome arrays of nanomagnets with out-of-plane magnetization are investigated using Magnetic Force Microscopy and Monte Carlo simulations. Experimental and theoretical results are compared to those found for the artificial kagome spin ice, in which the nanomagnets have in-plane magnetization. In contrast with what has been recently reported, we demonstrate that long range (i.e. beyond nearest-neighbors) dipolar interactions between the nanomagnets cannot be neglected when describing the magnetic configurations observed after demagnetizing the arrays using a field protocol. As a consequence, there are clear limits to any universality in the behavior of these two artificial frustrated spin systems. We provide arguments to explain why these two systems show striking similarities at first sight in the development of pairwise spin correlations.
7 pages, 6 figures
References in corpus (6)
- Artificial "spin ice" in a geometrically frustrated lattice of nanoscale ferromagnetic islands
- Direct observation of the ice rule in artificial kagome spin ice
- Geometric Frustration in Buckled Colloidal Monolayers
- Artificial Kagome Arrays of Nanomagnets: A Frozen Dipolar Spin Ice
- Energy minimization and AC demagnetization in a nanomagnet array
- Realizing Colloidal Artificial Ice on Arrays of Optical Traps
Cited by in corpus (8)
- Extensive degeneracy, Coulomb phase and magnetic monopoles in an artificial realization of the square ice model
- Ice Rule and Emergent Frustration in Particle Ice and Beyond
- Kinetic pathways to the magnetic charge crystal in artificial dipolar spin ice
- Competing interactions in artificial spin chains
- Proposal to recover an extensive ground state degeneracy in a two-dimensional square array of nanomagnets
- Magnetocaloric properties of frustrated tetrahedra-based spin nanoclusters
- Signatures of long range dipolar interactions in artificial square ice
- Artificial vertex systems by design