We report broadband spin-wave spectroscopy on kagome artificial spin ice (ASI) made of large arrays of interconnected Ni80Fe20 nanobars. Spectra taken in saturated and disordered states exhibit a series of resonances with characteristic magnetic field dependencies. Making use of micromagnetic simulations, we identify resonances that reflect the spin-solid-state and monopole-antimonopole pairs on Dirac strings. The latter resonances allow for the generation of highly-charged vertices in ASIs via microwave assisted switching. Our findings open further perspectives for fundamental studies on ASIs and their usage in reprogrammable magnonics.
@article{arxiv.1602.00918,
title = {Magnetization Dynamics of Topological Defects and the Spin Solid in Kagome Artificial Spin Ice},
author = {V. S. Bhat and F. Heimbach and I. Stasinopoulos and D. Grundler},
journal= {arXiv preprint arXiv:1602.00918},
year = {2016}
}