Tetragonal Deformation in Fe_2VSi at Low Temperatures

Abstract

X-ray powder diffraction measurements were made of the intermetallicFe₂VSi compound. At 300 K, Fe₂VSi has the L2₁-type structurewith the lattice parameter a=5.674 Å, but it exhibits atetragonal deformation at low temperatures. The lattice parametersobtained at 10 K are c=5.623± 0.003 Å, a=5.688± 0.001 Åand c/a=0.989.