Abstract
The in situ electrical resistance measurement and differential thermal analysis have been carried out for La68Al10Cu20Co2 and Nd60Al10Ni10Cu20 bulk metallic glasses under pressure up to 4GPa. The authors observed a clear drop of electrical resistance in the La- and Nd-based glasses at 1.44 and 1.17GPa at room temperature, respectively, and the sudden change is reversible with decompression. The differential thermal analysis revealed an endothermic process involved in the transition during compression and an exothermic process upon decompression. These results are strongly suggestive of an amorphous to amorphous phase transition induced by pressure in the two bulk metallic glasses.
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