The effect of the size of the system, aspect ratio and impurities concentration on the dynamic of emergent magnetic monopoles in artificial spin ice systems
arXiv:1208.3482 · doi:10.1016/j.jmmm.2013.03.034
Abstract
In this work we study the dynamical properties of a finite array of nanomagnets in artificial kagome spin ice at room temperature. The dynamic response of the array of nanomagnets is studied by implementing a "frustrated celular autómata" (FCA), based in the charge model and dipolar model. The FCA simulations, allow us to study in real-time and deterministic way, the dynamic of the system, with minimal computational resource. The update function is defined according to the coordination number of vertices in the system. Our results show that for a set geometric parameters of the array of nanomagnets, the system exhibits high density of Dirac strings and high density emergent magnetic monopoles. A study of the effect of disorder in the arrangement of nanomagnets is incorporated in this work.
References in corpus (10)
- Artificial "spin ice" in a geometrically frustrated lattice of nanoscale ferromagnetic islands
- Dirac Strings and Magnetic Monopoles in Spin Ice Dy2Ti2O7
- Theoretical and Experimental Status of Magnetic Monopoles
- Observation of Magnetic Monopoles in Spin Ice
- Magnetic monopole and string excitations in a two-dimensional spin ice
- 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
- Reducing Disorder in Artificial Kagome Ice
- Thermodynamics of elementary excitations in artificial magnetic square ice
- Nambu monopoles interacting with lattice defects in two-dimensional artificial square spin ice