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research article

Angular-dependent magnetization dynamics of kagome artificial spin ice incorporating topological defects

Bhat, Vinayak S.
•
Heimbach, Florian
•
Stasinopoulos, Ioannis
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2017
Physical Review B Condensed Matter

We report angular-dependent spin-wave spectroscopy on kagome artificial spin ice made of large arrays of interconnected Ni80Fe20 nanobars. Spectra taken in saturated and disordered states exhibit a series of resonances with characteristic in-plane angular dependencies. Micromagnetic simulations allow us to interpret characteristic resonances of a two-step magnetization reversal of the nanomagnets. The dynamic properties are consistent with topological defects that are provoked via a magnetic field applied at specific angles. Simulations that we performed on previously investigated kagome artificial spin ice consisting of isolated nanobars show characteristic discrepancies in the spin-wave modes which we explain by the absence of vertices.

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Type
research article
DOI
10.1103/PhysRevB.96.014426
Web of Science ID

WOS:000405697400005

Author(s)
Bhat, Vinayak S.
Heimbach, Florian
Stasinopoulos, Ioannis
Grundler, Dirk  
Date Issued

2017

Publisher

Amer Physical Soc

Published in
Physical Review B Condensed Matter
Volume

96

Article Number

014426

Subjects

artificial spin ice

•

ferromagnet

•

ferromagnetic resonance

•

spin wave

•

Dirac string

•

topological defect

•

magnetic monopole

•

magnonic crystal

•

magnonics

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LMGN  
Available on Infoscience
July 18, 2017
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/139353
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