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

The magnetic susceptibility, magnetization and the temperature and field dependence of the Hall coefficient have been measured for the magnetically ordered icosahedral quasicrystals Al70–xPd15Mn15Bx (x=0,2,4,6,8,10). The temperature dependence of the real and imaginary part of the complex ac susceptibility indicates re‐entrant magnetic behavior and dc 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 coefficient is independent of temperature in all the alloys and changes from negative to positive with increasing boron concentration. This can be explained by the effects of s–d hybridization. The anomalous Hall coefficient is also found to be temperature independent and has a compositional dependence correlated to the spin–orbit scattering rate.