Abstract
We report angular-dependent spin-wave spectroscopy on kagome artificial spin ice made of large arrays of interconnected ${\mathrm{Ni}}_{80}{\mathrm{Fe}}_{20}$ 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.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have