Microstructural effect on the low temperature transport properties of Ce-Al (Ga) metallic glasses

In the present work, the effect of microstructural variation on the low temperature transport properties of Ce75Al25 − xGax (x = 0 and 4 at.%) metallic glasses (MGs) have been investigated. The substitution of Ga has led to phase separation giving rise to nano-amorphous domains in a glassy matrix. It was suggested that the presence of two types of density clusters in the alloy with x = 4 may result in the formation of nano-amorphous domains with different short range ordering. The magnetic field tuned MR transition from positive to negative values at about 2.45 T has been observed for the first time with Ga substitution. The changes in the transport properties due to Ga substitution have been discussed in terms of formation of nano-amorphous domains and its link with 4f electrons for Ce atoms. This work, therefore, opens up new direction of investigation of 4f electron behaviors and its correlation with the microstructure and transport properties in Ce-Al(Ga) metallic glasses. It is expected that this study can provide some insights to understand the correlation between the microstructure and the transport behavior of Ce-Al (Ga) MGs.107