Mossbauer spectroscopy, magnetization and X-ray diffrraction measurements o
f the ternary compound Y(Fe0.95Mn0.05)(2) prepared by melting were performe
d in order to investigate the effect of the substitution of Mn on the magne
tic properties of YFe2. The experimental results show change of the lattice
parameter. The magnetization and the Curie temperature decrease with subst
itution of Fe by Mn.