Impact of Hydrogen Gas on the Inverse Spin Hall Effect in Palladium/Cobalt Bilayer Films

The influence of hydrogen gas absorption on the inverse spin Hall effect (iSHE) is measured in palladium/cobalt bilayer films. The iSHE is driven by ferromagnetic resonance in the Co layer and manifests as a dc voltage across the Pd layer. In the presence of hydrogen gas, the iSHE peak shifts downward in applied field together with the ferromagnetic resonance absorption peak for the material. In parallel, an increase in the iSHE peak height and width is measured.