論文

査読有り
2019年8月23日

Tunable magnetization dynamics in artificial spin ice via shape anisotropy modification

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

100
5
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevB.100.054433

© 2019 American Physical Society. ©2019 American Physical Society. 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.

リンク情報
DOI
https://doi.org/10.1103/PhysRevB.100.054433
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85072024166&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85072024166&origin=inward

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