Al-Si-MTM( Magnetic Transition Metal) amorphous ribbons were prepared from the melts in order to investigate the magnetic properties. These samples have no magnetic moment, except for Al-Si-Mn amorphous alloys, showing no Curie-Weiss type temperature dependence of the magnetic susceptibility. Al-Si-Mn amorphous alloys exhibit a spin-glass like behavior such as a magnetic cooling effect. The very high electrical resistivity of Al-Si-Mn amorphous alloys is correlated to the magnetic and resonant scatterings. No microcrystalline precipitate was confirmed by electron microscope observation
