  The thesis discusses micromagnetic simulation studies on high-frequency
magnetic dynamics in three-dimensional ferromagnetic nanoarchitectures made of
interconnected magnetic nanowire networks. Such artificial magnetic materials
with nanoscale features have recently emerged as a vivid topic of research, as
their geometry has a decisive impact on their magnetic properties. By studying
their static magnetization structure, we find that these systems display a
behavior analogous to that of 3D artificial spin ice lattices, with frustrated
interactions and the emergence of monopole-like defect structures at the wires'
intersection points. Our simulations reveal a high activity of these defect
sites in the magnonic high-frequency spectrum. We study various 3D
nanoarchitectures and show that their geometry and magnetization state results
in characteristic high-frequency signatures. Controlling these features could
open new pathways for magnonics research and reprogrammable magnetic
metamaterials.
