Coupled macrospins: Mode dynamics in symmetric and asymmetricvertices

We report the microwave response of symmetric and asymmetric threefold clusters withnearly contacting segments that can serve as the node in a Kagome artificial spin icelattice. The structures are patterned on a coplanar waveguide and consist of elongated andnearly-contacting ellipses with uniform thickness. Branches of the ferromagnetic resonancespectra display mode softening that correlates well with the calculations, whereasagreement between the measured and simulated static magnetization is more qualitative.