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.
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Work at Northwestern was supported by the NSF under grant DMR 1507058. Work at the University of Kentucky was supported by the NSF under grant DMR 1506979. Work at Argonne was supported by the U.S. Department of Energy, Office of Science, Materials Science and Engineering Division. Use was made of the Center for Nanoscale Materials, an Office of Science user facility, which is supported by DOE, Office of Science, Basic Energy Science under Contract No. DE-AC02-06CH11357.
Bang, Wonbae; Jungfleisch, Matthias B.; Montoncello, Frederico; Farmer, Barry; Lapa, Pavel N.; Hoffmann, Axel; Giovannini, Loris; De Long, Lance E.; and Ketterson, John B., "Coupled Macrospins: Mode Dynamics in Symmetric and Asymmetric Vertices" (2018). Physics and Astronomy Faculty Publications. 603.