Fragile-to-Strong Transition in Al-Ni-M (M=La, Pr, Nd) Metallic Glasses

We study the dynamic behavior of marginal metallic glass-forming liquids Al-Ni-M (M=La, Pr, Nd) in terms of liquid fragility in high and low temperature regions. The liquids are extremely fragile above the liquidus temperature T _liq, but become rather strong near the glass transition temperature T_g. The strength of the transition is inversely correlated with the fragility index at T_g. This relation is discussed in terms of potential energy landscape.