Tunable magnetization dynamics in artificial spin ice via shape anisotropy modification

T. Dion, D. M. Arroo, K. Yamanoi, T. Kimura, J. C. Gartside, L. F. Cohen, H. Kurebayashi, W. R. Branford

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Ferromagnetic resonance (FMR) is performed on kagome artificial spin ice (ASI) formed of disconnected Ni80Fe20 nanowires. Here we break the threefold angular symmetry of the kagome lattice by altering the coercive field of each sublattice via shape anisotropy modification. This allows for distinct high-frequency responses when a magnetic field is aligned along each sublattice and additionally enables simultaneous spin-wave resonances to be excited in all nanowire sublattices, unachievable in conventional kagome ASI. The different coercive field of each sublattice allows selective magnetic switching via global field, unlocking novel microstates inaccessible in homogeneous-nanowire ASI. The distinct spin-wave spectra of these states are detected experimentally via FMR and linked to underlying microstates using micromagnetic simulation.

Original languageEnglish
Article number054433
JournalPhysical Review B
Volume100
Issue number5
DOIs
Publication statusPublished - Aug 23 2019

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Dion, T., Arroo, D. M., Yamanoi, K., Kimura, T., Gartside, J. C., Cohen, L. F., Kurebayashi, H., & Branford, W. R. (2019). Tunable magnetization dynamics in artificial spin ice via shape anisotropy modification. Physical Review B, 100(5), [054433]. https://doi.org/10.1103/PhysRevB.100.054433