We report on the magnetic characterization of a novel ternary uranium intermetallic UNiGe2. When we assume that UNiGe2 has the orthorhombic structure of CeNiGe2-Type which is same as that of UNiSi2, the lattice constants were obtained to be a = 3.97 Å, b = 16.48 Å, and c = 4.08 Å. The unit cell volume of UNiGe2 is larger than that of UNiSi2. It comes from the fact that the atomic radius of Ge is larger than that of Si. The temperature dependence of the magnetic susceptibility shows two peaks at T N=45 K and T N′=65 K. Taking an account that UNi2Ge2 secondary phase exists in the compound, UNiGe2 is an antiferromagnet below T N while T N′ may come from the antiferromagnetic order of UNi2Ge2. At 5 K, the slope of the magnetization curve increases as increasing the magnetic field up to 5 T, indicating the presence of a metamagnetic transition. The residual magnetization remains on the magnetization curve at 5 K, which may come from a week ferromagnetism of UNi2Ge2 at low temperature.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 2018 Apr 19|
|Event||28th International Conference on Low Temperature Physics, LT 2018 - Gothenburg, Sweden|
Duration: 2017 Aug 9 → 2017 Aug 16
ASJC Scopus subject areas
- Physics and Astronomy(all)