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The spintronic properties of a palladium thin film have been investigated inthe presence of hydrogen gas in cobalt/palladium bilayers. Measurements of theinverse spin Hall Effect (ISHE) using cavity ferromagnetic resonance allowestimations of the spin Hall conductivity and spin diffusion length in bothnitrogen and hydrogen gas atmospheres. Unwanted spin rectification effects areremoved using a simple method of inverting the spin current direction withrespect to the measurement setup. Absorption of hydrogen gas in the Pd layer atjust 3% concentration results in a reduced ISHE voltage amplitude and bilayerresistance. Fitting the ISHE voltage against the Pd layer thicknessdemonstrates that the spin diffusion length decreases by 23% in the presence ofa hydrogen gas. On the other hand, the results indicate that there is nosignificant change in the spin Hall conductivity of Pd due to hydrogenabsorption.

Manipulation of Inverse Spin Hall Effect in Palladium by Absorption of Hydrogen Gas