AIP Advances (May 2018)

Coupled macrospins: Mode dynamics in symmetric and asymmetric vertices

  • Wonbae Bang,
  • Matthias B. Jungfleisch,
  • Federico Montoncello,
  • Barry W. Farmer,
  • Pavel N. Lapa,
  • Axel Hoffmann,
  • Loris Giovannini,
  • Lance E. De Long,
  • John B. Ketterson

DOI
https://doi.org/10.1063/1.5007281
Journal volume & issue
Vol. 8, no. 5
pp. 056020 – 056020-6

Abstract

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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.