Magnetization and magnetoresistance study of amorphous FexPd82−xSi18

Abstract

We find that amorphous FexPd82−xSi18 undergoes a transition from spin glass (x≲5) to ferromagnetic (x?25) through an intermediate state (x?10 –20). In Fe25Pd57Si18, magnetic order persists at room temperature. The importance of spin fluctuations in the spin glass, intermediate and ferromagnetic regimes is indicated by the negative magnetoresistance at 4.2 K which does not saturate up to ∼230 kOe.