MAGNETIC AND ELECTRONIC-PROPERTIES OF THE MAGNETICALLY ORDERED QUASI-CRYSTALLINE ALLOYS AL70-XPD15MN15BX

The magnetic susceptibility, magnetization and the temperature and fie ld dependence of the Hall coefficient have been measured for the magne tically ordered icosahedral quasicrystals Al70-xPd15Mn15Bx (x=0,2,4,6, 8,10). The temperature dependence of the real and imaginary part of th e complex ac susceptibility indicates re-entrant magnetic behavior and de magnetization measurements are interpreted in the context of this behavior. The present Hall resistivity measurement shows the existence of both normal and anomalous Hall effects. The normal Hall coefficien t is independent of temperature in all the alloys and changes from neg ative to positive with increasing boron concentration. This can be exp lained by the effects of s-d hybridization. The anomalous Hall coeffic ient is also found to be temperature independent and has a composition al dependence correlated to the spin-orbit scattering rate. (C) 1996 A merican Institute of Physics.