Dynamic response of an artificial square spin ice
Dynamic response of an artificial square spin ice
Magnetization dynamics in an artificial square spin-ice lattice made of ${\mathrm{Ni}}_{80}{\mathrm{Fe}}_{20}$ with magnetic field applied in the lattice plane is investigated by broadband ferromagnetic resonance spectroscopy. The experimentally observed dispersion shows a rich spectrum of modes corresponding to different magnetization states. These magnetization states are determined by exchange and dipolar …