Dzyaloshinskii-Moriya Interaction in Iron Garnets: From chiral textures to spin waves – DeMIuRGe

Recent progress in material synthesis opened novel perspectives to generate new classes of magnetic excitations stemming from the Dzyaloshinskii-Moriya interaction. Our objective in the DeMIuRGe project is to understand and ultimately control how chiral interactions of the Dzyaloshinskii-Moriya form can be induced in thin films of ferrimagnetic insulators, namely iron garnets. They possess a magnetic damping in the 10^(-4) range, typically two orders of magnitude smaller than ferromagnetic 3d metals, making them a unique model system to study the complex properties of the magnetic quasi-particles, the magnons. The inclusion of chiral interaction(s) in garnets will allow the exploration of many recent theoretical predictions that can be experimentally realised exclusively in such low-damping materials, including asymmetric spin wave propagation, specific excitation modes and nonlinear properties.