Ferromagnetic resonance study of eightfold artificial ferromagnetic quasicrystals | Zendy

Vinayak Bhat | Zendy; Joseph Sklenar | Zendy; Barry Farmer | Zendy; Justin Woods | Zendy; J. B. Ketterson | Zendy; J. Todd Hastings | Zendy; L. E. De Long | Zendy

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Ferromagnetic resonance study of eightfold artificial ferromagnetic quasicrystals

Author(s) -

Vinayak Bhat,

Joseph Sklenar,

Barry Farmer,

Justin Woods,

J. B. Ketterson,

J. Todd Hastings,

L. E. De Long

Publication year - 2014

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.4859035

Subject(s) - permalloy , ferromagnetic resonance , condensed matter physics , quasiperiodic function , materials science , ferromagnetism , quasicrystal , magnetization , symmetry (geometry) , resonance (particle physics) , magnetic field , physics , atomic physics , quantum mechanics , geometry , mathematics

We have performed broadband (10 MHz–18 GHz) and narrowband (9.7 GHz) ferromagnetic resonance (FMR) measurements on permalloy thin films patterned with quasiperiodic Ammann tilings having eightfold rotational symmetry. We observed highly reproducible mode structures in the low-frequency, hysteretic regime in which domain walls and unsaturated magnetization textures exist. A minimum of 10 robust modes were observed in patterned samples, compared to the single uniform mode observed in unpatterned permalloy films. The field dependence and approximate eightfold rotational symmetry of the FMR spectra are in good agreement with micromagnetic simulations that confirm the importance of patterning for controlling static and dynamic magnetic response.

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