Abstract
We report the microwave response of symmetric and asymmetric threefold clusters with nearly contacting segments that can serve as the node in a Kagome artificial spin ice lattice. The structures are patterned on a coplanar waveguide and consist of elongated and nearly-contacting ellipses with uniform thickness. Branches of the ferromagnetic resonance spectra display mode softening that correlates well with the calculations, whereas agreement between the measured and simulated static magnetization is more qualitative.
Highlights
Systems with frustrated magnetic interactions,[1,2,3,4] such as artificial spin ice arrays and artificial quasicrystals,[5] have recently attracted much attention, with respect to the field dependences of the quasi-static magnetic response and accompanying magnetic instabilities
The static and dynamic response of spin ice lattices are generally rather complex, and it is important to understand some basic properties of their individual building blocks
The structures were patterned on top of a coplanar waveguide using electron beam lithography (EBL), thereby achieving maximal coupling and sensitivity
Summary
Systems with frustrated magnetic interactions,[1,2,3,4] such as artificial spin ice arrays and artificial quasicrystals,[5] have recently attracted much attention, with respect to the field dependences of the quasi-static magnetic response and accompanying magnetic instabilities. The dynamic behavior of the underlying macrospins is of interest, but has received much less attention, especially with respect to soft mode behavior[6,7,8,9] near instabilities. The static and dynamic response of spin ice lattices are generally rather complex, and it is important to understand some basic properties of their individual building blocks. By reducing the aspect ratio of one of the segments for comparison with the symmetric threefold geometry
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