Y(Co1-xAlx)2 compounds with x up to 0.2 have been studied by means of magnetization,
resistivity and magnetoresistance measurements in the temperature range from 4.2 to 280 K and in magnetic
fields up to 38 T. The paramagnetic to ferromagnetic transitions are characterized by an enhancement of
both the magnetization and the resistivity, whereas at the metamagnetic transitions, observed in some of the
compounds, the discontinuous changes of the magnetization and the magnetoresistance are of opposite
nature: the magnetization increases at the transition, whereas the magnetoresistance decreases. The results
are discussed in terms of induced Co-magnetic moments and spin fluctuations. The absence of spinfluctuation
effects is pointed out for the weakly ferromagnetic compounds with 0.11 < x ?? 0.2. ?? 1995.
