Speaker
Description
Interconnected nanomagnets periodically arranged in one and two dimensions, called magnonic crystals, have been shown to provide tailored band structures for spin waves. The same has been found for antidot lattices. Aperiodic tilings and so-called artificial quasicrystals are far less explored. We fabricated nanopatternd holes in CoFeB thin films that were arranged in a Penrose tiling. Using broadband spin wave spectroscopy, we studied the absorption of microwaves and the propagation of spin waves. We observed characteristic sets of resonances in both the absorption and transmission experiments. We interpret the results in terms of dispersive eigenmodes of the quasicrystalline nanohole lattices. This work was supported by SNF via grant number 163016.
