We report here our high field magnetization (in fields up to 15 T, and preliminary FMR studies on amorphous Fe90−xNixZr10 with x=0 and 20. The addition of Ni remarkably modifies the magnetic properties of Fe90 Zr10 alloy which can be summarized as follows: (1) The ferromagnetic transition temperature, TC, increases from 230 to 476 K; (2) While the magnetization in Fe90Zr10 does not saturate at 4.2 K for applied fields up to 15 T with a large susceptibility χhf ≂9×10−4 Oe−1, the substitution of Ni for Fe leads to an easy saturation for a field of 1 T, which is unusual for a random magnet; (3) At 4.2 K the magnetic moment of the alloy increases from 1.48μB to 1.6μB per atom, from which the magnetic moment of Fe in the Fe–Ni–Zr alloy is estimated to be 2.3μB/atom. The FMR line width in Fe90Zr10 increases monotonically with decreasing temperature. For the x=20 alloy, the line width is found to be about 160 Oe, and the value of g is found to be 1.94. These results suggest that interpretation of the properties of Fe–Zr alloys on the basis of weak itinerant ferromagnetism should be taken with caution.