Influence of doping elements (Cu and Fe)
on the crystal
structure and electrical resistivity of YNi3 and Y0.95Ni2
Chem.
Met. Alloys 4 (2011) 152-159
https://doi.org/10.30970/cma4.0181
O. MYAKUSH, V. BABIZHETSKYY, P. MYRONENKO, H. MICHOR, E. BAUER, B. KOTUR
Two solid solutions on the basis of the binary compounds YNi3 and Y0.95Ni2 were investigated by X-ray and
electron probe microanalysis for the influence of Fe and Cu-doping on the
crystal structure and electrical properties. Substitution of Cu for Ni in YNi3
does not change the structure type (PuNi3).
The replacement of Ni by Cu in Y0.95Ni2-xCux up
to x <
0.15 and the replacement of Ni by Fe in Y0.95Ni2-xFex up to x < 0.1 preserve the structure of the binary
parent compound Y0.95Ni2 (TmNi2 structure type, space group F-43m). Substitution
by larger quantities of Cu and Fe destabilizes the TmNi2 superstructure, which converts into the MgCu2
structure with disordered Y vacancies. All the investigated alloys showed metallic-like conductivity following
the Nordheim relation.
Temperature
dependent electrical resistivity of solid solutions Y0.95Ni2‑xFex.
Keywords
Yttrium intermetallic
compounds / Doping / Crystal structure / Electrical resistivity