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

M. Pasturel (1) , A. Pikul (2) , G. Chajewski (2) , H. Noël (1) , D. Kaczorowski (2)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 PAN - Polska Akademia Nauk = Polish Academy of Sciences = Académie polonaise des sciences

URu0.29Ge2 is a new germanide crystallizing in a monoclinic structure (C2/c space group, lattice parameters a = 4.098(1) angstrom, b = 15.936(3) angstrom, c = 4.045(1) angstrom and beta = 90.091(2)degrees) derived from the CeNiSi2-type. It undergoes a ferromagnetic ordering at T-c = 63 K, which manifests itself as distinct anomalies in temperature variations of the magnetization, specific heat and electrical resistivity. Just below T-c 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.

Mots clés: intermetallics (germanides); electrical properties; magnetic properties; X-ray diffraction

Domaines: Chimie

M. Pasturel, A. Pikul, G. Chajewski, H. Noël, D. Kaczorowski. Ferromagnetic ordering in the novel ternary uranium germanide URu0.29Ge2. Intermetallics, 2018, 95, pp.19-23. ⟨10.1016/j.intermet.2018.01.011⟩. ⟨hal-01807086⟩