Influence of the Vertex Region on Spin Dynamics in Artificial Kagome Spin Ice

Stuck in the middle with you: The spin-wave mode localized in the contact area among macrospins in an artificial spin ice (ASI) is interesting for magnonic devices and applications. Detection and characterization of this mode is difficult, though. This study uses carefully designed lattices of individual macrospins with the right aspect ratio of individual nanoelements, the right geometry of macrospins on an ASI vertex, and the right configuration for clear detection of the spin dynamics. The localized mode is found to exhibit a peculiar sensitivity to the applied field's direction, which could impact applications such as magnonic position transducers.