Abstract
AbstractSingle‐phase EuLiGe2 and YbLiGe2 compounds were synthesized using a high frequency heating method. The crystal structure of EuLiGe2 was determined; it is an orthorhombic system, in space group Pnma, which crystallizes with aCaLiSi2‐type structure: a = 7.7880(10) Å, b = 3.9385(10) Å, c = 10.6436(10) Å. RELiGe2 (RE = Eu, Yb) is made up of lithium and germanium atoms forming a ten‐membered ring with channels occupied by two rare earth atoms. The Ge atoms are arranged in a zigzag manner and form the backbone of the structure. The magnetic susceptibility of EuLiGe2 obeys the Curie–Weiss law above 40 K (Eu2+) and shows antiferromagnetic ordering at 29 K followed by spin reordering at 23 K. Electrical resistivity measurements revealed the metallic nature of EuLiGe2 and confirmed the two magnetic orderings at low temperature. The divalent nature of Eu was confirmed by X‐ray absorption near edge spectroscopy (XANES). Magnetic measurements of YbLiGe2 showed that it is paramagnetic without long‐range magnetic ordering down to 2 K. The magnetic susceptibility deviates from the Curie–Weiss law below 100 K, presumably because of crystal field effects from Yb3+ ions. Magnetic susceptibility measurements of YbLiGe2 show a mixed‐valent ytterbium atom, and a magnetic moment within the linear region (<100 K) of 2.16 μB/Yb is very well supported by XANES.
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