A HEAVY FERMION-TYPE BEHAVIOR OF CE-BASED AMORPHOUS-ALLOYS

The bulk amorphous alloys Ce-Cu and Ce-Ru prepared by dc sputter-depos ition show a heavy fermion-like behavior, which is characterized to be the dense impurity Kondo system more enhanced than the crystalline co unterparts. However, the Ce-Ru amorphous alloy shows a broad maximum i n the electrical resistivity around 35 K, suggesting the formation of a coherent Kondo state even in the lack of the long-range periodicity of atomic arrangement.