Investigation of the
interaction of the components in the RE1-xRE'xCu2In
(RE = Y, La, Ce,
Gd) systems
Chem.
Met. Alloys 8 (2015) 91-97
https://doi.org/10.30970/cma8.0314
Anton Kharkhalis, Oleksandr
Bednarchuk,
Galyna Nychyporuk, Dariusz Kaczorowski, Vasyl Zaremba
Four pseudo-binary RE1-xRE'xCu2In systems
were investigated at 870 K using X-ray diffraction: (La,Y)Cu2In, (La,Ce)Cu2In,
(La,Gd)Cu2In, and (Y,Gd)Cu2In.
The formation of continuous solid solutions with MnCu2Al-type
structure was observed in all cases. In agreement with the atomic radii of the
rare-earth elements, the composition dependencies of the unit cell parameters
of these Heusler phases exhibit a monotonous decrease
when La is replaced by Y, Ce, or Gd,
but a slight increase when Y is replaced by Gd. An
investigation of the magnetic properties of single-phase alloys belonging to
the La1‑xGdxCu2In solid
solution (x = 0.1-0.4) showed
Curie-Weiss paramagnetism with predominantly antiferromagnetic interactions between Gd3+
ions, but no magnetic ordering down to 1.72 K.
Unit cell parameters of the phases with MnCu2Al-type
structure (squares) and MgCu4Sn-type structure (circles) observed in
the La1‑xYxCu2In system, as
a function of the yttrium content.
Keywords
Ternary indides /
Solid solution / X-ray powder diffraction