Structure and magnetism of new R₂Cu₂In hydrides (R = Ce, Gd)

Chem. Met. Alloys 1 (2008) 46-49

https://doi.org/10.30970/cma1.0016

Khrystyna MILIYANCHUK, Alexandre V. KOLOMIETS, Yaroslav V. GALADZHUN, Ladislav HAVELA, Ihor I. BULYK, Andriy M. TROSTIANCHYN, Yaroslav M. KALYCHAK

Two new hydrides of intermetallic ternary indides have been synthesized – Ce₂Cu₂InH_2.8 and Gd₂Cu₂InH_0.8. Both hydrides crystallize with tetragonal structures of the Mo₂FeB₂ structure type, similar to those of the initial compounds. The relative lattice expansion reached 6.38% for Ce₂Cu₂InH_2.8 and 4.10% for Gd₂Cu₂InH_0.8. Magnetic measurements did not reveal any tendency toward magnetic ordering for Ce₂Cu₂InH_2.8 down to 5 K. In the case of Gd, hydrogenation changes the type of magnetic order from ferromagnetic for Gd₂Cu₂In (T_C = 85.5 K) to antiferromagnetic below 41 K for the hydride Gd₂Cu₂InH_0.8.

Temperature dependence of the magnetic susceptibility for Gd₂Cu₂InH_0.8.

Keywords

Hydrogen storage materials / Magnetic measurements / X-ray diffraction