Structural and magnetic properties of Dy2Fe17Hx (x=0 and 3) single crystals

The effect of hydrogen on structural and magnetic properties of the Dy2Fe17Hx single crystal was investigated. The host alloys symmetry is retained upon hydrogenation. It was found that the magnetic characteristics (such as the Curie temperature and magnetocrystalline anisotropy) are highly sensitive to the presence of hydrogen and exhibit dramatic changes with changing of H content. The results are discussed in terms of a model considering the interaction of the quadrupole and 4f electron magnetic moments of the rare-earth ion with the interstitial hydrogen atoms.