Spin Waves in Artificial Crystals and Metamaterials Created from Nanopatterned Ni80Fe20 Antidot Lattices

Periodic nanopatterning of metallic ferromagnets allows one to create devices with artificially tailored band structures for spin waves. We discuss our recent experiments performed on two-dimensional periodic lattices of nanoholes created in thin Ni80Fe20 films which exhibit man-made allowed minibands and forbidden frequency gaps provoking artificial crystal behavior and metamaterials properties.