  A C14 Nb0.975Fe2.025 Laves phase compound was investigated aimed at
determining the H-T magnetic phase diagram. Magnetization, M, and AC magnetic
susceptibility measurements were performed. Concerning the former field-cooled
and zero-field-cooled M-curves were recorded in the temperature range of 2-200K
and in applied magnetic field, H, up to 1000 Oe, isothermal M(H) curves at 2 K,
5 K, 50 K, 80 K and 110 K as well as hysteresis loops at several temperatures
over the field range of -10 to +10kOe. Regarding the AC susceptibility, both
real and imaginary components were registered as a function of increasing
temperature in the interval of 2 K - 150 K at the frequencies of the
oscillating field, f, from 3 Hz up to 999 Hz. An influence of the external DC
magnetic field, H, on the temperature dependence of the AC susceptibility was
investigated, too. The measurements clearly demonstrated that the magnetism of
the studied sample is weak, itinerant and has a reentrant character. Based on
the obtained results a magnetic phase diagram has been constructed in the H-T
coordinates.
