Ferromagnetic ordering in the novel ternary uranium germanide URu0.29Ge2

URu0.29Ge2 is a new germanide crystallizing in a monoclinic structure (C2/c space group, lattice parameters: a = 4.098(1) Å, b = 15.936(3) Å, c = 4.045(1) Å and β = 90.091(2)°) derived from the CeNiSi2-type. It undergoes a ferromagnetic ordering at TC = 63 K, which manifests itself as distinct anoma...

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Bibliographic Details
Published in:Intermetallics 2018-04, Vol.95, p.19-23
Main Authors: Pasturel, M., Pikul, A., Chajewski, G., Noël, H., Kaczorowski, D.
Format: Article
Language:English
Subjects:
A- intermetallics (germanides)
B- electrical properties
B- magnetic properties
Chemical Sciences
F- X-ray diffraction
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Summary:URu0.29Ge2 is a new germanide crystallizing in a monoclinic structure (C2/c space group, lattice parameters: a = 4.098(1) Å, b = 15.936(3) Å, c = 4.045(1) Å and β = 90.091(2)°) derived from the CeNiSi2-type. It undergoes a ferromagnetic ordering at TC = 63 K, which manifests itself as distinct anomalies in temperature variations of the magnetization, specific heat and electrical resistivity. Just below TC, the T-dependent resistivity exhibits a broad hump, which hints at complex magnetic structure of the compound, while below 5 K it shows an upturn that likely arises due to atomic disorder in the crystal lattice. •The formation of URu0.29Ge2 is reported for the first time.•It crystallizes in a mono clinically distorted CeNiSi2 structure type.•It orders ferromagnetically below TC = 63 K.•Both specific heat and resistivity are influenced by the crystallographic disorder.•Structural and physical relationships with UGe2 are discussed.
ISSN:0966-9795
DOI:10.1016/j.intermet.2018.01.011