Figure 1
From: Reversible 90-Degree Rotation of Fe Magnetic Moment Using Hydrogen

Schematic illustration of the effect of hydrogenation on the Pd covered Fe/Pd/Fe trilayers on Mg(001) substrate. Hydrogen molecules dissociated on the top Pd layer and diffused into the underlayers. The electronic structure of the Pd-mediate layer, and the interlayer magnetic ordering between the two Fe layers, is expected to be modulated through Pd-hydride formation.