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Yu. L. YAROPOLOV, V. N. VERBETSKIY, S. A. NIKITIN, and A. S. ANDREENKO
«Paramagnetic Susceptibility of Intermetallic Compounds RNi (RSm, Tb, Gd, Dy) and Their Hydrides »
271–275 (2010)

PACS numbers: 61.05.cp, 61.46.Hk, 75.20.En, 75.30.Cr, 75.40.Cx

Interaction of RNi compounds with hydrogen and influence of hydrogenation on magnetic properties of these intermetallics are studied. Ternary hydrides with compositions GdNiH3.2, TbNiH3.4, DyNiH3.4, SmNiH3.7 have been produced by hydrogenation of source compounds at temperature of 297 K and pressure of hydrogen less than 1 atm. Ternary hydrides possess orthorhombic structure of CrB type (Cmcm space group). As revealed, the hydrogen introduction into structure of RNi intermetallic compounds results in substantial growth of volume of a metal matrix, reduction of the ferromagnetic interaction, and lowering of paramagnetic Curie temperature.