HALL-EFFECT AND RESISTIVITY IN Y-3D (FE, NI) BASED AMORPHOUS FILMS

We have studied the magnetic behavior of amorphous Y-3d based systems, using resistivity and Hall effect measurements. YxNi1-x metallic glas ses show a very different magnetic behavior from Fe glasses, with a cr oss over (x = 0.22) from weak itinerant ferromagnetism to paramagnetis m. Two more magnetic metallic glasses have been studied, a typical fer romagnetic system Fe-Si-Y (with Fe content only 52%) and a noncollinea r ferrimagnetic (sperimagnetic) system (Fe-Si-Tb). In spite of their v ery different magnetic mechanisms the resistivities all show low tempe rature minima with logarithmic dependence below the minima temperature s. This behavior is not magnetic field dependent, with applied fields up to 70 kOe. We show Hall effect measurements that easily distinguish the different intrinsic mechanisms.