TY - JOUR
T1 - Magnetic properties of the UNiGe2 at low temperature
AU - Ohashi, Kohei
AU - Ohashi, Masashi
AU - Sawabu, Masaki
AU - Miyagawa, Masahiro
AU - Maeta, Kae
AU - Yamamura, Tomoo
N1 - Funding Information:
This work was performed under the inter-university cooperative research program of the cooperative research program of the Institute for Materials Research, Tohoku University (Proposal No. 17K0057). This work was supported in part by Futaba Electronics Memorial Foundation and by Research Foundation for the Electrotechnology of Chubu.
PY - 2018/4/19
Y1 - 2018/4/19
N2 - 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.
AB - 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.
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U2 - 10.1088/1742-6596/969/1/012101
DO - 10.1088/1742-6596/969/1/012101
M3 - Conference article
AN - SCOPUS:85046085297
VL - 969
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012101
T2 - 28th International Conference on Low Temperature Physics, LT 2018
Y2 - 9 August 2017 through 16 August 2017
ER -