Hydrogen absorption and (57)Fe Mossbauer effect in UFeGe

Abstrakt

Hydrogenation of UFeGe transforms the monoclinic type of structure into the orthorhombic (TiNiSi-type) and subsequently to the hexagonal (ZrBeSi-type) structure. It does not induce magnetic order, however magnetic susceptibility is enhanced.

The Sommerfeld coefficient gamma increases from 12 mJ/mol K(2) in UFeGe to 36 mJ/mol K(2) in UFeGeH(1.7-1.8) (beta-hydride). The observed variations of electronic properties are mainly due to the modified geometry of the lattice, characterized by enhanced inter-uranium spacing, and reduced 5f-3d hybridization in the hydrides. (C) 2011 Elsevier B.V.

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Klíčová slova

• Hydrogen
• absorption
• 57Fe
• Mossbauer
• effect
• UFeGe