Micromagnetic Investigation of Microwave Permeability of Magnetic Artificial Spin Ice

Abstract

The complex permeability of the artificial spin ice array at different magnetic states is calculated using the micromagnetic simulation method. It is observed that the permeability spectra are dependent on the magnetization distributions of the array. The dependence of the permeability spectrum on the applied magnetic field strength and on the spacing gap between the neighboring elements is also investigated. Depending on the initial magnetization saturating direction, the permeability spectrum exhibits different sensitivity to the strength of the external applied magnetic field and to the spacing distance between the comprising elements of the artificial spin ice array.

Advances in artificial spin ice

“…In particular, the relationship between the lattice geometry, the magnetic configuration present and the resonant modes that occur within the nanomagnets has been demonstrated with experimental measurements on artificial square ice, which revealed multiple modes in the spectra in addition to the main resonance 111 . Micromagnetic simulations 112 and scaling arguments 51 show that the modes can be understood in terms of the number and location of emergent magnetic monopoles. In particular, the emergent magnetic monopoles created during magnetization reversal in an applied magnetic field (Fig.…”