STRUCTURAL AND MAGNETIC CHARACTERISTIC OF THE INTERMETALLIC COMPOUNDSHO2AL17 AND HO2NI17

It is for the first time that the intermetallic compound Ho2Al17 was p repared. The compound is paramagnetic and obeys the Curie-Weiss law wi th THETA(p) = 18 K and mu(eff/fu) = 14.89 mu(B) and crystallizes in th e hexagonal structure with the lattice parameters a = 9.80 angstrom an d c = 8.76 angstrom. The intermetallic compound Ho2Ni17 Crystallizes i n the hexagonal structure with a = 8.32 angstrom and c = 8.03 angstrom . The compound is ferrimagnetic with T(c) = 612 K and the effective ma gnetic moment per formula unit determined from the paramagnetic region is mu(eff/fu) = 16.5 1 mu(B), very close to the theoretical value 16. 44 muB. The Curie temperature for the once melted samples is 462 K and shifts up to 612 K for the samples heated in the magnetic field (0.95 T) at 1150 K during 1 h.