[en] Full text: Magnonics is an area of research that studies dynamic magnetic phenomena in magnetic materials. One fundamental type of the dynamics is precession of the magnetisation vector about its equilibrium direction in the materials. This gives rise to magnetisation oscillations (called “Ferromagnetic Resonance, (FMR)”) and waves (“called spin waves”). Quanta of these microwave-frequency excitations are magnons, which gave the name to the area. We found that the FMR response of palladium-based ferromagnetic films [1] and nanostructures [2] is very sensitive to the presence of hydrogen gas in the sample environment. This led us to suggestion of a real-world magnonic hydrogen sensor. Importantly, being based on a novel sensing principle, our sensor is able to resolve hydrogen concentrations in the upper concentration range - between 20% and 100%. This range is very important for fuel-cell applications, but most of other sensor concepts loose sensitivity for these ultra-high gas concentrations. In this talk, our latest results of investigation of the effect of hydrogen gas on the FMR and Inverse Spin Hall Effect [3] responses of Pd/Co bi-layer and PdCo and PdFe alloy films will be presented. These results include observation of an ultra-strong effect of the gas on the FMR peak frequency for a Pd₇₃Co₂₇ alloy film and a finding that absorption of hydrogen by Pd results in a decrease in the spin diffusion length for this metal, as probed in the conditions of FMR in a Pd/Co bi-layer film. (author)