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Physical Review B
We report spin wave excitations in a nanopatterned antidot lattice fabricated from a 30-nm thick Ni 80 Fe 20 film. The 250-nm-wide circular holes are arranged in a rhombic unit cell with a lattice constant of 400 nm. By Brillouin light scattering, we find that quantized spin wave modes transform to propagating ones and vice versa by changing the in-plane orientation of the applied magnetic field H by 30 • . Spin waves of either negative or positive group velocity are found. In the latter case,doi:10.1103/physrevb.86.014417 fatcat:mldv7xgpk5c6dgfp7lonmmblxy