High-Field Magnetization Measurements for a Single Crystal of Er_(2)Fe_(17)H_(3) Hydride

摘要

High-field magnetization process of the single crystal of Er_(2)Fe_(17)H_(3) is investigated and compared with that of the parent Er_(2)Fe_(17) in order to clarify the effect of interstitial hydrogen on magnetic properties. Substantial change in the magnetic anisotropy behavior observed for Er_(2)Fe_(17)H_(3) is explained by the modification of the interaction between the 4f-shell orbital moment of Er and the crystal field leading to the change of the second-order crystal electric field coefficient A_(2)~(0). Hydrogenation does not practically affect the intersublattice molecular field.