Abstract

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.

Details

Title
Magnetic properties of the UNiGe2 at low temperature
Author
Ohashi, Kohei 1 ; Ohashi, Masashi 2 ; Sawabu, Masaki 1 ; Miyagawa, Masahiro 1 ; Maeta, Kae 1 ; Yamamura, Tomoo 3 

 Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan 
 Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan; Institute of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan 
 Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan 
Publication year
2018
Publication date
Mar 2018
Publisher
IOP Publishing
ISSN
17426588
e-ISSN
17426596
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2572056021
Copyright
© 2018. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.